There's a gal on Etsy that does these quilts. She did one for my coworker and it turned out fabulous. I bet you could go into her site and ask her how she quilts hers and she would be happy to give you advice.
Here's the site. I think BarbMalm is the gal who made my coworker's quilt.
http://www.etsy.com/search_results.p..._type=handmade