I got locked in/trapped in our Scamp on the last trip.  I have a 2012 16-ft Deluxe.  The door handle and lock were a bit sticky.  Note that I replaced the door handle and lock about 2 years ago.  I think it is possible that I locked the handle and pulled it shut behind me.  On pre-2018 Scamps, there is not a way to unlock the door from the inside, at least that I can see.  I was not eager to climb out the escape hatch.  So, I took off the screen on the back sliding window and looked for someone to give the keys to and unlock the door.  I did not see anyone so I climbed out the back window.  That works if one is slim and agile.  Unfortunately, I discovered that I could not unlock the door because of a sticky lock and/or tight door.  I took the handle and lock off.  It was corroded and the stem/spindle could not turn the lock on the door.  I put some fine oil on the stem and it quickly worked freely.  I reattached it and unlocked the door.  I think that moisture had seeped into the handle and stem.  It is probably a good idea to lubricate the stem periodically.  Also, I painted the lock position on the key lock with paint so that I can tell if the handle is locked and I don't pulled a locked door handle behind me.  I hope this story helps someone avoid the same problem.