I am in the AC business in Florida. There are only 3 ways to remove your humidity. Run an AC, use a dehumidifier, and flush out the humid air with a fan. In your travel trailer, you can run your ac when hooked to shore power or a generator. If it is nice out, you can run the roof fans and I would suggest a Fan-tastic roof fan. You might want to add an extra fan to increase the air flow. You want to blow out your high humidity and bring in lower humidity air from outside. That works pretty well in the arid southwest but not in the humid southeast and Florida.
You probably have a big ac on the roof. If you can run it all the time you will get rid of your humidity. You might also consider a small window unit that will run longer than the big roof top unit. AC's cool based on BTU's but they dehumidify based on time. If you put a monster unit on top of your TT, it will cool great but it will not run long enough to pull out the humidity. A small window unit will run constantly and while it won't cool your trailer very well, it will take the humidity out.
Dehumidifiers work well enough, but you will need a big one to pull all the water your 10 bodies are generating. For $150, you can put a window unit in the trailer and get some cooling as well.