Hi Ted
Since I'm building a set slightly different than others, here is how I have my set arranged.
1 box - Southern Leaguers
2 boxes - Polar Bears
2 boxes - All the other cards/backs to my set
I have to keep my Polar Bears separate to avoid any confusion. The same rule applies with my checklists. Two separate checklists, one for Polar Bears and the other checklist for the rest of the non-Polar Bear back subjects.
I guess I'm a glutton for self inflicted punishment.