Regarding the DFRPG sales, can they get permission to designate someone's room as a booth with set hours of operation? Would a vendor permit be needed, and is that at the con's discretion? I don't know how elaborate the permitting process would be, and if the Con Room just took orders and emailed Evil Hat for distribution it wouldn't be perfect, but it might generate sales since live demonstrations would be going on.
I know keeping stock on hand and dealing with money is never as easy as it looks from the other side.