I like entry #30 the best out of your designs because I think it will fit better on printed materials but I'm not a fan of the green. Can you change the green to a blue?
I still like entry #33 the best out of your designs. I had a few friends look at the logos and the only thing they did not like about yours is they think the beaver looks like a squirrel. Maybe you could change his tail to make it look more like a beaver.