I would suggest taking a small amount of your fabrics and layer them with the batting and practice. Practice what you want to do to see if it is indeed doable.
So, I can't help with your free motion question, sorry, but I can pass along a bit of advice about working with chenile.
I just finished a chenile quilt for my future grandson. Chenile top and chenile backing. And add batting to that and it is thick!
WOW, what a difficult quilt! I have been sewing for years and have never taken out so many stitches.
I was fortunate enough to be given a walking foot and was able to 'finally' finish the quilt. Love the walking foot....
If you do the top and batting and free motion, how do you plan to attach the back to make it secure?
You can look at my blog if you would like to see my finished chenile quilt....my first and last quilt out of chenile.
