Good review. I'm partial to prestas also but most of the fat bike community seems to prefer schraeders.
Enjoy the bike. I've only taken mine (new Minnesota 3.0) on a couple of very gentle snow covered trails because I'm only 5 weeks post-road bike mishap-induced fractured pelvis (x3), but the fat bike seems like it will be a lot of fun. Looking forward to when I can stomp on it in heavier snow.