I started a thread some time ago about getting feedback on the Sno-bunje and got some real intellectual responses

Like you mentioned about the "work-out" comments and the "don't get stuck" mentality. If these guys would ever get off the lake or the neighbors field and try a little boondocking they'd never know how to get home let alone out of trouble.
As for the Sno-bunje, check out the websites and see what you think. Works on the basis of kinetic energy. Just playing around with it, I think it should be pretty effective.I bought one last month and have yet to try it. A shovel is huge! Always carry one. Walk around to pack down, dig and pull. If you try to tow a stuck sled out of deep stuff, you now have 2 stuck sleds. It's a team effort. Don't go it alone. On my quad I carry ropes and pullies to rig mechanical advantage systems. Too heavy to carry on a sled though.