I was in the same boat as you last month.
Something changed in my boots and I was getting a terrible blister on my left heel.
I began to panic with a fast approaching dall sheep hunt.
I drove to anchorage to buy a new pair of boots. After hours of trying on different types of boots, I just couldn't do it! I couldn't buy a pair of boots and take them into the mountains without breaking them in.
I ended up taking a gamble and buying some superfeet insoles.
My feet held up as well as expected. No blisters sheep hunting. Then I packed a entire moose out 1 1/4 miles one way with wet feet. Still no blisters!
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