Yes yes and no
A SMART charger yes.. (The second yes is a bit more complex) The older "Dumb" chargers from say 1970 For like an hour or 2 yes but not for long.. WHY. they don't know when to quit.. The smart chargers do.. I have a Deltran Battery Tender that does 20 amps for "Bulk" charging and 70 for jump starting Works well when needed.. Takes a while since my primary converter is 80 amps but when it failed the Deltran did the job 100 bucks at autozone on the model I have.
Now. the 2nd yes:
Your trailer likely has MARINE/deep cycle type batteries.. The difference between these and the battery that starts your car is not worth talking about.
They are STARTING batteries which pay lip service to Deep Cycle they are NOT DEEP CYCLE like the six volt GC-2's my Class A came with.