Don't wanna hijack Sean's thread here but to answer a couple of questions..........
Jay, check t-bags.com I don't have the willie and max so I can't comment on those.
Nkauf21, I have the larger of the 2 from T-bags. It does cut down the wind a small amount but you'll still catch plenty of bugs in your grill. Plenty of room for me to pack the esentials for a couple of nights but........I travel light. Check the site. They will give you a cubic ft. capacity. Hope that helps guys. Later.

 

Sean I use the t-bags on my 2000mile trip from Jersey to Canada for the Americade rally. Go to web site they have different types,I use them with my detachable sissybar and they work fine. They also have a smaller bag that attaches to the big bag. The smaller bag I use around town and keep my rain gear inside. Also makes a gret back rest for the long haul Have a good trip I might swing by Gettysberg on my way back from the Americade rally at Lake George