shooting a documentary, camera choice?
I live in a very rural area, and I'm considering shooting a doc on the daily life of people around here. I currently own a Canon hf m30 consumer camcorder. It shoots pretty good HD in good light conditions... but I was considering upgrading to a Canon DSLR (Rebel t3i) with a nice lens, because the camcorder doesnt really have a useable manual focus. However, the shooting I will be doing will require some live, nonstaged action (hunting, events, etc). Will it be too difficult to pull focus on a DSLR in these situations? I'd really like to have the DSLR for interviews and such as well, but i'd like to avoid a huge, expensive shoulder rig / follow focus. Thanks!