What fun you will have! I don't know what kind of quilting you normally do, but I think I would showcase some of the bold patterns in simple designs. Maybe tone down a bit with some solids. But big and bold is the way I would go. Kids love that kind of thing, so even if you don't want to do a lot of projects for yourself out of this haul, you have a gold mine in supplies for children and teenage quilts. If you find it overwhelming and some of the prints not attractive to you, donate them to your local Project Linus chapter.
Also, there may be some trademarked fabrics in the stash that may be worthwhile to sell on Ebay if they are out of print and hard to find.
Enjoy!!
Dayle