If you have been on any Airstream forum, group etc you have seen posts about folks getting locked out of their Airstream. I have a couple solutions…
LockOut Blocker https://www.etsy.com/listing/1174381351/lockout-blocker-for-airstream-doors?ref=yr_purchases
Brake Backing Plug https://amzn.to/4bBAF7s
Need Extra Keys – check out this video https://youtu.be/jN1ZSG06I0s