Hi Lowell,
Excellent question about hiking in Sorels with a 30 pound back. My experience in the Adirondacks was with a the Rochester NY Winter Mountaineering Society which was a group of 10-15 men wanting to bag peaks in the Adirondacks during the winer. Picture a single line of men with packs on with the lead on snowshoes breaking trail for 100 yards and then moving to the rear for the second in line to break snow and ad infinitum. I had at least a 30 pound pack since we always camped overnight on, or near, the top.
And 5 to 8 miles sounds like a pretty good estimate of how far we traveled. The problem with answering your question is I never hiked in these conditions without wearing snowshoes. It was simple impossible given the snow depth. Always had them on except when it got really icy and I switched to 10 point flexible crampons – the kind that have a seperate front and back set of spikes attached via a flexible metal joint/rod – not microspikes.
Based on my limited hiking experience just wearing Sorels, sans snowshoes, I would not recommend hiking in just Sorel Caribous. They have no defined sole lug pattern which means no traction. And if you decide to use flexible crampons for any distance the boot sole is too soft and flexible. Your feet will quickly become sore due to the stiff rod between the front and rear crampons. Maybe microspikes would work – I haven’t tried that approach.
Other forum users replying to your question have offered very good alternative foot wear using either insulated hiking boots or purchasing over boots. If you’re not planning to use snowshoes on the bottoms of your Sorels my recommendation is not to use your Sorel Caribous. I do not think a 30 pound pack weight is an issue. Traction is.
Sincerely,
Russ

