Sorry to hear these troubles may prevent you from enjoying the RV experience.
If you are parking these items on the street or front yard, you may consider moving them to a secured storage space.
In our area there are what we call periodic door knockers that check for unlocked vehicles overnight to take personal items. I am always amazed how people will think nothing of parking a $50,000+ vehicle on the street because the garage is filled with $500 worth of junk. No damage to the vehicles, just the stuff is gone in the morning.