Re: Survival gear
The gear Drummy quotes seems almost timeless, all that changes is the materials and the technology. Fleece instead of wool, better radios, GPS etc.
The principles of self-reliance and spreading the risk between sledges / vehicles always apply, as do enough fuel to melt snow for water and enough high-calorie food for basic and emergency rations. Assume the worst and always pitch your tent as if you'll be there a month (sometimes people have been!).
I'm intrigued now Snowcat - where is this trip to be? Any chance of pictures of your vehicles or previous outings?