Lady bugs good, Japanese beetles bite, stink-no good, hide everywhere. How do you tell the difference? Lady bugs good in garden, Japanese beetles bite, stink, hide everywhere.
We have found that "roach tabs" work well for roaches, silverfish and some other crawlies. They are odorless and can be spread around inside the camper.These also work very well in fixed dwellings.
Moth balls help as a rodent deterrent. I scatter a bunch of them around the wheels and underneath the camper.