I have a rather nice 36ft travel trailer that we leave parked permanently near our favorite lake in a well managed campground. We recently have found evidence of a mouse or mice inside the camper and also in the outside enclosed camp kitchen. I know that they are traveling in and about the camper via the plumbing grommets through the underbelly which is enclosed for winter camping. I have spent numerous hours sealing up any possible place they could get in from. I am positive that I have been thorough in my process. They are still inside though...which was not what I was hoping for. I am scared to death that if we poison them they will get back into the underbelly and die and then the smell will be a disaster! I have tried sticky pads with cheese and have had no luck...we visit the camper about every other week and cannot set conventional traps as the smell would be horrible if they died in the trap and we were not there to remove them...Help!!! Any advise would be appreciated!