Enable Booking Option and Inline Calendar on front end.

functions.php

<?php

function bkap_booking_default_settings() {

		?>
		<script>
			jQuery( document ).ready( function ( $ ) {
				if ( jQuery('#bkap-booking-type' ).length > 0 ) {
					// Enable Booking.
					jQuery('#booking_enable_date').prop( 'checked', true );
					// Enabling Inline Calendar
					jQuery('#enable_inline_calendar').prop( 'checked', true );
				}
			});
		</script>
		<?php
}
add_action( 'wp_print_scripts', 'bkap_booking_default_settings' );