I use just a 10 amp fuse for the jumper. We have done it occasionally at one of the campgrounds we frequent a lot. It is a high traffic place with a lot of off road vehicles. Definitely not a place to go if your looking for peace and quiet. We have never left them on over night but if people do that doesn't bother us. It does make it a little easier to find your camper when you have been out visiting other campsites sharing toddies.
If the trailers a rockin, dont bother a knockin, just come on in and make yourself a drink. We wont be long.