I can say those glue traps are great! I never thought of putting them in the trailer, but I will now. I live in the country and those dang mice get inside my basement every winter! I have sealed up every place imagineable, and have found one spot I think they get in, they've pulled away the weather strip along a door and slip in behind it on the hinge side...which is really tiny!
One hint when setting glue traps, mice like to run down the edge of a wall, so I set my traps at a spot where they have to funnel through a narrow opening along a wall edge, like a gap along a cabinet and wall...catches them every single time. Can't count how many I caught...now to put it to work in the hi-lo.