mandyrose, your avatar always cracks me up!

there is sure to be a lot of quilts

Happy for you!

I have had a few quilts made out of polyester and they are warm. I am sure they would be great as "donation" quilts for homeless or shelters. I know you will be able to find a good use for it.

Those double knits make excellent picnic/camping/ carry in the car quits. Don't dump it until you know you have no use for it. I think bedding for animals at the shelter would be grand. It's pretty tough stuff. I made one for a grandson and he uses it constantly on his bed, although I intended it to be for his kayaking and outdoors expeditions.

Oh, wow! Do something wonderful and so simple with the double knits. Cut them into squares, then sewn together into a top, backed with flannel and then tied in the corners (either with "string" or machine tacking). Nice for rough treatment by friends and family or at shelters for people. Don't dismiss that they are very durable and useful for those in need. They wash and dry easily and the colors hold up quite well. Good nursing home donation project as their laundry is hard on cottons.

Wow!! How nice of her to think of you! That is an awesome gift.

Yes, double knit makes great utility quilts. Cut it in larger squares, maybe 8 to 10, and tie or tack it. Do not use knit for the backing unless you are just laying it flat on a table or floor to tie. It will stretch way out of shape if you put it in any kind of frame. (Ask me how I know!) Flannel or other woven fabric that you don't know what to do with make great backs for a knit top. Not sure that I would use it with any animal that could catch it's claws in the knit.
Great floor quilts for babies (since knits are often brightly colored) or picnic quilts. Nice to keep in the trunk for those unexpected times when you need something to throw on the ground or snuggle under when outdoors.

I do not envy you at all. I just finished sorting through 10 trash bags of quilting fabric. It was great to get it but it took 2 weeks and now I have to rework my entire sewing room to find room for it. I have given away 50 yds of fabric easily and still have way too much to ever use up. Good luck with your treasure.

Wow! that is an awesome collection. I quilt everything I get my paws on....so I'd be using the lot. That double knit stuff is indestructible.