A few things--if you use a foundation--whether it is muslin or an old sheet or fusible lightweight interfacing, you really can get away with 1/8th inch seam. I steer away from used dryer sheets because most of my quilts are for charity and I worry about the residual chemicals and scents in the sheets.
If you have 'larger' crumbs, consider slab blocks. Crumbs on steroids.