We have been on the road full-time for over 7 years and do not stay at truck stops or rest areas ( too noisy). We do however stay in Walmart parking lots occasionally, but choose to stay in smaller towns. We don't stay in the large cities where the crime rates are probably higher. We have never had an incident or felt uneasy. If we did, we would move on. No special surveillance, no special locks. Bay doors unlocked (except water and gas tank) and have never had a thing stolen, haven't even caught anyone trying to see what they might find.