Sorry to hear about your theft.
Hatches are easy to pop open without a key so do not think changing locks will slow any one down. You can pop one open just as fast & quiet without a key. Also most golf carts of each brand (Club Car / EZ Go) use the same key unless the switch has been changed.
As the saying goes locks are for honest people. Years ago I knew a guy at work that cold get into a #3 Master Lock faster without a key than I could with a key.
People with convertibles did not lock their doors. If someone wanted in, leaving the door unlocked was much cheaper than having to replace the top too.
As far as campgrounds never had a theft & rarely lock our doors...........