I have hiked (not too much...) with a 30 kg pack, and luckily, a partner in the same misery. The partner proved sooooo useful to hoist the pack, 'cause with could only lift it to hip height, and with both hands, lady newbies we were!
Help from a fellow is still the best way <img src="/forums/images/graemlins/smile.gif" alt="" />.