Backpack hunting can be a lot of fun. They are a lot of work, but it is the best hunt you will ever do. I do it all of the time. The trick to backpack hunting is

1) Packing correctly - a week's worth of food and gear should weight about 70 lbs. Most guys bring waaaayyy to much crap

2) Getting in shape - this means lots of exercise

3) The correct gear - good gear is essential when you can't just go back to the truck at the end of the day

Backpack hunting is tougher than hell, and it's a sacrifice. No cots, dehydrated food, no fresh clothes...but it makes it so much sweeter when you bring that animal back to the truck.