What are you worried about being stolen? There are places that can be made, or reinforced, to provide security for small items, like cash, credit cards, firearms, etc. If that is your concern, then ask a security/alarm expert to help you secure your coach, and your items in a hidden location, from theft.
In my coach, I have the safe that came with the coach, that is kept almost empty except for a wallet with a lot of expired credit cards and a few one dollar bills.
The rest of my items are well secured in a hidden compartment that is alarmed and would take a considerable amount of time to open, assuming the thief found it. As far as my electronics go, I don't really care but anyone that comes inside is being filmed the whole time so hopefully the police can find them. They make some inexpensive 12 volt cameras/recorders. If not, my stuff is insured.