I would not hire a lawyer to let me pick up a trailer that I owned and had a title on. I would just go and get it and take it home or to some other campground. Don't take a gun but do ask a deputy to accompany you. Take your title with you too, then there won't be any question about who owns what.
BTW, what is it with so many people thinking that a gun is going to help settle a disagreement anyway? At the ramp, on the water, over a trailer, give me a break. None of that crap short of someone threatening YOUR life is gun worthy. And even then I like to think I'm smart enough to avoid those situations. 63 years old, USMC veteran so definitely not an anti gunner person at all and never felt the need to pull a gun on anybody yet. Honestly if gives me the creeps when someone suggests it for something that isn't anything like a real threat situation. Think people, think. With your head.