trif

I got a "little" carried away and decided to make my youngest sons girlfriend a quilt using only Minky front and back, and since it's for her bed I made it 95" x 95", I love how soft and fluffy Minky is and don't want to loose the softness with too much quilting.
Question 1) being such a big heavy quilt won't it need a fair amount of quilting to hold it together?
2) any design recommendations?

I had planned to quilt meandering swirls but now I'm not sure.
I hope I post the pics correctly, if so then the first is the top and gray with hearts is the backing.

Thanks for your suggestions