Put the top codeblock in the "On Activation" for a "Radio" repeatable radio trigger. It should create an LZ and a task for it. Haven't worked out how to cancel the current task yet, so oh well, don't create a billion tasks. To fix later (pronounced /ˈnɛvə/))

arma3-lz-maker.sqf

_currTask = player call bis_fnc_tasksCurrent;  
if (not isNil (_currTask select 0)) then { [(_currTask select 0),"CANCELED"] call bis_fnc_taskSetState; }; 
searchRadiusMin = 5000;
searchRadiusMax = 8000;
landingZoneSize = 10;  
landingZoneSlope = 0.25;   
smokeDistance = 2000;   
playerPos = getPos player;   
randomPos = [playerPos, searchRadius, searchRadiusMax, landingZoneSize, 0, landingZoneSlope] call BIS_fnc_findSafePos;  
markerName = format ["LandingZone_%1", str(random 1000)];  
_marker = createMarker [markerName, randomPos];  
gridRef = mapGridPosition randomPos;  
_marker setMarkerType "hd_dot";  
_marker setMarkerText gridRef;  
ingressDir = ["N", "NW", "W", "SW", "S", "SE", "E", "NE"] call BIS_fnc_selectRandom;  
egressDir = ["N", "NW", "W", "SW", "S", "SE", "E", "NE"] call BIS_fnc_selectRandom;  
hint format ["%1\nSmoke\nNo Obstacles\nNo Friendlies\nNo Factor\n2Kms Smoke will be popped\nIngress %2 Egress %3", gridRef, ingressDir, egressDir];  
_taskName = "Move to Landing Zone";  
_taskDescription = format ["%1<br/>Smoke<br/>No Obstacles<br/>No Friendlies<br/>No Factor<br/>2Kms Smoke will be popped<br/>Ingress %2 Egress %3", gridRef, ingressDir, egressDir];  
chars = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9"];  
randomString = "";  
for "_i" from 1 to 10 do { randomChar = selectRandom chars; randomString = randomString + randomChar; };  
[player, randomString, [_taskDescription, _taskName, _marker], randomPos, true] call BIS_fnc_taskCreate;  
[] spawn { waitUntil {(player distance randomPos) < smokeDistance};  
_smoke = "SmokeShellGreen" createVehicle randomPos;  
hint "Smoke Deployed";  
};  
[] spawn { waitUntil {(player distance randomPos) < 50 };  
[randomString,"SUCCEEDED"] call bis_fnc_taskSetState;  
hint "Task Complete";  
};  
deleteMarker _marker;

// COPY EVERYTHING ABOVE //
// COMMENTS DON'T WORK IN RADIO TRIGGERS //


// Trying to remove any current task. The task selection doesn't appear to be working so this doesn't do anything atm
_currTask = player call bis_fnc_tasksCurrent;  
if (not isNil (_currTask select 0)) then { [(_currTask select 0),"CANCELED"] call bis_fnc_taskSetState; }; 

// vars to change if you want
searchRadiusMin = 5000;
searchRadiusMax = 8000;
landingZoneSize = 10;  
landingZoneSlope = 0.25;
smokeDistance = 2000;

// get player pos and finds somewhere thats within the search radius, not on a stupid slope, on land, and with no obstacles within 10m
playerPos = getPos player;   
randomPos = [playerPos, searchRadiusMin, searchRadiusMax, landingZoneSize, 0, landingZoneSlope] call BIS_fnc_findSafePos;

// Create marker. Theres some redundancy here. Sue me
markerName = format ["LandingZone_%1", str(random 1000)];  
_marker = createMarker [markerName, randomPos];  
gridRef = mapGridPosition randomPos;  
_marker setMarkerType "hd_dot";  
_marker setMarkerText gridRef;

// Create randomised ingress and egress directions
ingressDir = ["N", "NW", "W", "SW", "S", "SE", "E", "NE"] call BIS_fnc_selectRandom;  
egressDir = ["N", "NW", "W", "SW", "S", "SE", "E", "NE"] call BIS_fnc_selectRandom;  

// Pop a LZ Brief Hint
hint format ["%1\nSmoke\nNo Obstacles\nNo Friendlies\nNo Factor\n2Kms Smoke will be popped\nIngress %2 Egress %3", gridRef, ingressDir, egressDir];  

// Create a task
_taskName = "Move to Landing Zone";  
// Task description uses HTML
_taskDescription = format ["%1<br/>Smoke<br/>No Obstacles<br/>No Friendlies<br/>No Factor<br/>2Kms Smoke will be popped<br/>Ingress %2 Egress %3", gridRef, ingressDir, egressDir];  
// Creating a random ID for the task, so the task can be repeatable
chars = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9"];  
randomString = "";  
for "_i" from 1 to 10 do { randomChar = selectRandom chars; randomString = randomString + randomChar; };  
[player, randomString, [_taskDescription, _taskName, _marker], randomPos, true] call BIS_fnc_taskCreate;

// Wait until the player is close and deploy a smoke grenade. I think this will cause a memory leak if not triggered. Need to do something about that. spawn [] essentially spins itself off into it's own thread so it needs to be closed by something
[] spawn { waitUntil {(player distance randomPos) < smokeDistance};  
_smoke = "SmokeShellGreen" createVehicle randomPos;  
hint "Smoke Deployed";  
};

// Another memory leak maybe if the task isn't succeeded
[] spawn { waitUntil {(player distance randomPos) < 50 };  
[randomString,"SUCCEEDED"] call bis_fnc_taskSetState;  
hint "Task Complete";  
};  

// clean up the map
deleteMarker _marker;