I would advise letting the AC run 24/7 also.
The two things that affect your AC's ability to overcome heat built up inside the pop-up (if it's turned off) is of course the ambient air temp outside but also how much (if any) direct exposure to the Florida sun it receives. If your campsite at the Fort has a fair amount of shade it is easier to overcome. If you get a spot, say, in the new portion of the 600 loop which is wide open and in the sun full-time, much harder. The Reflectix/Pop Up Gizmos help all the time but especially in the full sun situation. Maybe add a "shady site" request to your ressie....
Given the fact that in June it's likely to be a high humidity time already you will need to keep the inside cool probably round the clock. Your AC will produce a steady trickle of condensation run-off from the roof that will drip off constantly. When you position your camper on the pad at the Fort and level it (if needed), you will want to position it so the run-off is not an issue. For example, my Jayco pop-up drains off the rear driver's side (when towing). So I always position that corner as close to the edge of the concrete pad or over the grass so that the run-off doesn't puddle up on the pad or creep toward the door side of the pop-up where people will be walking.
I also mentioned on another thread about your pop-up awning. In June with sudden showers possible almost every afternoon, make sure you slant your awning steeper-than-what-you-think to shed the water. My awning tore although it was slightly slanted, there was enough slack in the material to allow rain water to puddle up and the weight tore the canvas. Don't let this happen to you. So shorten a corner awning pole or tip it to shed the rain.
Good luck and enjoy! BTW, I'll put in a plug for tim5055's pop-up website. It's very interesting to me.
Bama ED