If I know we will have work that requires access to the tunnel from front to rear that is accessible via the bays, I unload everything from them.
Inside, I remove medications, booze, and a few of my higher end electronic items that are portable. But, I do this not because of lack of trust of the shop I'm working with, it is because I like having this equipment with us, and of course th booze and medicines come in handy too...
When we are not in our coach traveling, it is parked next to our home garage. We're not in a high crime area, but IMO I have just as much of a chance of someone breaking in and grabbing things here, as I would at the RV repair facilities that I frequent.
Pay quite a bit for full timers insurance (we travel over six months a year), and I do my best to not lo worry about the walking off of our stuff
Best to all,