Well, DF, but had an error. Had AEo and SADo (I know, funny name for a town). I suppose I might have tried AER later on today, after I'd had a little time away from the puzzle, but there were two other crosses that wore us out. PYE/AYERS and ALEK/KAUAI. We tried both the Y and the K very early on, but when neither set off the "Well Done" notification, we tried other possible word-making letters one after another, and then again. Finally, it didn't seem all that fun anymore.
The puzzle theme was broken early, and once it was, most of the fill was quite easy. It must have been quite a chore putting this thing together, but the payoff was somewhat less than satisfying, partly, to be fair, due to our lack of knowledge, but partly, I think, due to some less-than-fair crosses and some less-than-inspired fill. RLS, ULT, BOSNS, SOTO, OHED, LTS, SADR(!).
I know, I'm just bitter. Perhaps you had more fun with it. I hope so.