I've started a war with my garage mice. Each night I just put a little cheese on a spring trap and each morning I check it. At four for $2 I don't even bother reusing the trap, just toss it and the mouse and set up another one.
I tried the walk in can't walk out traps and never caught anything. Not willing to use poison because I don't want a dead mouse where I can't find it and get it. And there's something satisfying about knowing the mouse had an immediate death. I haven't found a better mouse trap.
Just be consistent in your trapping and the family that found your rv home will eventually be eliminated. Inconsistency will allow breeding and repopulating time to occur.