Any concerns with running a camper with a 15 amp connector
It is fairly common for RV and trailer owners to use a 30-15 amp adapter while they are stored, to power the on-board trickle charger for the battery, for lighting, and for the refrigerator. 

The problem is when someone uses the AC and a combination of these other things. You may very well trip the breaker in your home panel, and/or end up with an adapter that looks like this:


The rule of thumb is that if you need to run the AC, run only the AC unless you have a 30 amp circuit for your un-adapted power cord.