It is never easy when someone violates a persons property. It sounds like it may be a one time event based on the fact that you say someone was trying to change their appearance. Doesn't make it any easier but might help in the long term that this could be an isolated case of someone that would not normally be in the area and was passing through taking advantage of the first place he saw.
Many of the RV's around here are stolen and taken to the high desert to become meth labs. One thing you see in common is that the fridge access panels are removed. According to the PD it is common for RV owners to store a hide a key in this area, this thief apparently was checking for a key as well.