You want to do a 4th season backpack hunt? Hmm. Have you ever done a late season. Backpack hunt? Depending on where you go you may have a lot of snow and cold to deal with. In my experience that saps hunters energy quickly. By that time of year usually the big bucks are moving down to lower elevations to find the does for the rut. They may be rutting but maybe not. I helped a friend last year 4th season and it was sunny and fairly warm. 4th season you will have to contend with elk hunters but few deer hunters. It can be a truly fantastic hunt but it's not a gimme for big bucks. Since 4th season is such a limited tag you can ask questions and guys will help with the unit you pick. If I were doing it I'd do a wall tent or camper or even a hotel depending on the area. If you get lots of snow those deer will be down low. I would also plan to be mobile. You will want to look over lots of bucks. I would also show up a couple days ahead if you can so you can scout. Best of luck to you