There are always small spaces which could be storage cabinets, but are not considered (by the manufacturer) to be worth putting a door on or otherwise preparing for use; there have been a few discussions of spaces which Escape owners have made into usable storage. Any of those with an access panel that doesn't look like a door could be a good place for a safe.
Trailer: 2015 Escape 19' (sold), Escape 5.0 as of August 2019
The safe I got was the ADB-928 Portable Car Safe with digital lock on Amazon. Amazon shows it currently unavailable but you may find it elsewhere. I looked at many different ones. Tip...look for portable gun safes and then check the dimensions for your iPad etc. Yes, we like it. It's big enough and simple to operate. It won't stop a determined thief but it may send them looking elsewhere.