we have made literally dozens of denim raggy quilts- they are fabulous! denim makes wonderful raggy quilts. i don't have a front loader- but have had no problems washing / drying them at home...when i have it constructed & clipped i take it outside & give it a good shake- then toss it in the washer- when it gets through the wash cycle i take it outside again & give it a good shake- then rinse- another good shake before the dryer=
then about 20 minutes into the dry cycle i take it out & shake it good-empty the lint trap..back in- sometimes(depending on the size of the quilt) i empty the lint trap 3-4 times before the quilt is dry...giving it a good shake outside each time- i know-seems like alot of work---but in my book well worth it...people love these quilts-they are beautiful, fluffy, warm & cozy...and hold up-last for years (still have the first one my mom made me back in 1972)