Bare Minimum 315/75/16

Long time lurker, first post on here. I've learned a lot from this site and I'm looking for some specific info.
I just bought a 2007 DCSB TRD OR package. I'm coming from two different 1st gens over the last six years, both of which were on 255/85s and basic suspension. They were good trucks, but lacked the ability to go where I need to in deep snow.
The plan for this truck is RCLT or JD Fab long travel and 40s, but not until maybe the year after next. I need, and will use all the offroad capability I can get on various hunting trips throughout the year. Lion season in the winter and spring bear hunts usually find me buried up to the frame more often than I'm proud to admit.
In the meantime, I have a set of 255/85 Yokohama G003 to throw on. When those are gone I'm going straight to a 315/75-16.
Since it's not the final state of the truck, I'm trying to cut some corners I know I shouldn't and do it on a budget. Cutting/welding etc isn't an issue for clearance. My short term plan is:
1. Factory wheels, 1.25" Spidertrax in front
2. Bilstein 5100s or 3rd gen factory coilovers and rear shocks
3. Toytec or Icon leafs
4. No gears, which is stupid but I don't want to go 4:56 just to go lower when the rest goes on later
5. Factory UCA

Anyone want to point out a glaring issue that just won't work? Will I get the alignment and clearance I need out of the factory UCA? The truck will only be a daily until some time next spring.