Another idea for making the panel removable: use picture frame for the "molding" around the panel, make the top piece removable, then you can slide the panel down into its spot, just like sliding the back into a picture frame. If you have the space, this could be a nice solution.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!