I would serge/zigzag the edges. I fold mine and put it in a large mesh washing bag. I use 3 color catches with darker fabrics. I do not tumble dry large pieces - for me that is when they turn into monsters. Someone told me to go to a laundrymat and put each large piece in a separate dryer - the tubs are bigger and there is less knotting. Never tried it that way. I wash in warm water, and wash and dry my quilt after binding - never had any issues - but I like puckering.