Well, I've been lurking around and figured I throw in my 2 cents. I've flown my 145hp 170B for the last three years on Landis/Airglas 2500's. The first year was with a 76x53 prop it didn't do to bad, now I fly a 80x42 (it definitely makes a big difference in take off/climb performance). Here is a few thing I learned or herd about the 145/170 on skis.
170's don't turn worth a $#!+ to the right, anticipate your turns and stopping, I taxi without seat belt and clear all wires (head set) in case you need to jump out and use the old fashion heel brakes.
Start with the long take off and landing spots figure out what you airplane will do under all snow conditions, packed, loose, dry, wet, crystal, fluff at all density alts.
When landing on virgin snow, drag your spot, then lay down numerous sets of track (get a feel for the snow) when setting you tracks off set them so you have nice wide tracks to land on.
Once landed remember you may have to turn around off your packed tracks if deep or sticky snow it may require a little extra momentum and power.
In addition to the standard winter survival gear, I carry snow shoes, small scoop shovel, rope-a-long or come-a-long, 4-ice screws, ax, rope.
I'm sure others will provide more hint, that all I could think of right now, be safe and have fun.