George,
Again, I think it's mostly a matter of practice. That said, I have really small feet as well, so keeping my feet off the brakes is less of a problem than someone with bigger feet. For years, I flew 185's on wheel skis in the winter wearing bunny boots, because almost everywhere I went with those airplanes, there was a good chance of meeting overflow.
Flying with bunny boots isn't always easy, and the boots themselves are definitely NOT that comfortable, but they are the only boot I know of that will save your feet if you step into deep overflow in really cold temps.
I too love the mukluks. But, step in water at -30 and you'd best be getting a fire going quick, or change shoes. In a few winters we had where there was no overflow, I've worn mukluks, and there is no comparison to the bunny boots for both comfort and tactile feel.
That said, it just takes some practice to work all the pedals while wearing bunny boots. The gnarliest situation I ever ran into was wearing bunny boots, and instructing from the right seat in a 185 with a ski pump further compromising your leg room. It can still be done, though.
And, I am NOT the ace of the base, by any means.
MTV