jeez chain link! google exomesh i have used it to secure my bags in the less salubrious places of my travels as well as locking my stuff when i am away from my 90 and it packs away into a pocket.
beats carrying a roll of fencing though i don't know how exomesh would fare against a bear especially if you had cakes and stuff in the bag.
btw if you did manage to attach it to a hole could the perp just reach through it and take your stuff? help my head hurts.
I bought some used shelving, approximately 1.5" square vinyl coated steel mesh. Cut to fit over windows (U-bolted to interior roll cage), and it keeps my dogs in and (when dogs aren't in residence) perps out.
I drive my truck in some of the more un-savory parts of DC but have never thought of going to this extreme! Is there a reason you wouldn't just go with some lock boxes and/or Tuffy? Whatcha carrying in that Rover!?!
I dont even lock my Defender. The imobiliser (motion sensor) will trip and it won't start. A window cost more than a GPS or whatever else is in the car. A good knife will cut through any soft top.... A pelican case bolted down with a lock is another option (bolted from the inside with a backing plate on the other side...