First, welcome to 5'ver country.
Look on the doorjamb of the driver's side and check the air pressure for the front and rear axles listed there. Take all tires to that pressure.
At the first CAT scale, you need to weigh as follows: 1. Entire rig (make sure to place the rig on the scale so the front truck axle is on one pad, the rear truck axle is on another pad, and both trailer axles are on a 3rd pad. ) After weighing the rig, drop the trailer and go back and weigh the truck by itself. This will give you a hard number for your trailer's pin weight. You will most likely be over the GCWR for your rig unless you have a dually. You need to establish the weight on your rear axle, because that is the one most likely to be overloaded! You should also look at the max load on the tires on the rear axle and be sure not to exceed those limits.
Now. Listen to someone who has figured this out the HARD way:
Go to Wally World and buy a 12 ton hydraulic jack. That's right, 12 tons. I've changed a number of tires on my 5'ver (before I figured out I need 10 ply tires) and you need a 12 ton jack. I figured, at first, that 4 tons would be more than enough. It won't lift it safely. When you have to change a tire (and you will), you will also need enough boards to build a platform for the jack so the top of the jack will touch the frame of the trailer. You have to lift the frame a good bit to get the tires to come off the ground for removal... . or use the truck jack to life the axle on the 5'ver.
McDill has, in the past few years, expanded the campground a good bit. A lot of folks pull out of FL in order to be back home up North for Easter, but I'd still call ahead. Another really nice campground in FL is at Mayport Naval Station east of Jacksonville. The campground is right on the St John's River and Atlantic Ocean.
As you are staying at McDill, I take it that you are retired military. Thank you for bearing arms for this nation, which that cowardly S. O. B. William Jefferson Clinton refused to do.
Florida Ed