I can't possibly comply with all the requests from all the participants so I may just decline participating and make my own I-Spy quilt with my bags. This is supposed to be pleasurable . . .
When it comes to fabric pieces less than fat quarter, I have mixed washed and fresh fabrics with no problems except one time with a red square that added creative interest to the quilt. I make I-Spy quilts for kids and old people, neither of which are persnickety.