What form of backpack bests for heavy load recreational backpacking?

Answer:
Look for an internal-frame overnight or expedition pack at REI (www.rei.com) or MEC in Canada (www.mec.ca)... go for about 60 - 80 litres size... be sure it has sturdy, supportive waist and chest straps. Everything else is personal preference.
First answer by Tim J. Last edit by Tim J. Contributor trust: 48 [recommend contributor recommended]. Question popularity: 16 [recommend question].