from my experience, i can say that i'm more concerned about raccoon and coyote, etc...
they tend to dig stuff up like blood/fish meals. we don't really have that much of a black bear presence here, but there are a few. i will tell you however that some animals will dig thru your soil just because it looks/smells newly disturbed. for this reason i would recommend amending all holes at least 30 days before planting.
just my .02
good luck man, and i hope to see some more updates as the season progresses!