3500 Miles Next Month...What to do Now?

I'm looking for some suggested maintenance items to get done before a long month of driving. I'm at 78000 miles, so my next maintenance is at 90000 miles I think? I'm getting an oil change tomorrow, and maybe a coolant flush. As well as some new non-studded snow tires. Next week I'll drive from Montana to Minnesota(995 miles) then to Chicago(700 miles) then back to Minnesota then back to Montana, all before December 27th. From their I'm driving from Bozeman, Montana to Nelson, British Columbia for the start of a 12 day ski trip around British Columbia. In total I plan on putting about 3500 miles plus on my standard 2004 4cylinder Tacoma. I'm wondering if there's anything I should do before I leave maintenance wise?

 

The oil change is a must and you are already doing that.
Other than that, I would put together a kit in a back pack or something to help if something should happen expecially since everywhere you are going will be freezing cold. Blankets, clothes, water, food, etc...

Coolant flush at your mileage isn't a bad idea either.

Only other thing I can think of is maybe having the differential fluids changed? Not a must but it wouldn't hurt. Other than that, have fun! That's a lot of driving.