I made some yummy apple butter. And with a lot of fruits and berries, you could mix and match.
Since you have a lot available, try lots of different things. Just because it hasn't been done before, or you can't find a recipe, doesn't mean it can't be done.
What I would suggest is to find the oldest farm woman (or man) you can, and ask HER (or him) what she had done with these fruits and berries that most people do NOT. Might surprise you.