First off, Awesome you got the rig back relatively unscathed.
In addition to a spare, I always keep a spare key on the rig. Its Velcro to a frame rail, you cant see unless you crawl under the rig but you can grab it if you know where to look.
Anyway, I love that thing. I intentionally lock my keys in the car when we are the river or somewhere it would really suck if I lost them. Has even come in handy to have family be able to pick it up from airport parking etc.
Funny story, I was flying out of LAX and traffic was horrible, ended up running out of time so I had to park in airport which was $35/day. My dad was flying in a couple hours later from a business trip. I had him grab my car out of the expensive lot, drive to the off-site parking (cheaper) where his car was at and swap it! Worked out great.
Moral of the story, get one of these. They are so worth it. (FYI I am from Camarillo and frequented silverstand often)
https://www.amazon.com/Hillman-Soft-...s%2C243&sr=8-5