Thanks for the insight, I probably would have never thought to talk to the rangers. I can see hauling my gear will be tough even with a backpack. I figure I'll carry my 1Ds, 16-28 or 28- 70, 70-200, 2x extender, extra battery, 3-1 gig microdrives. I have a 40 gig digital wallet and a laptop for downloading at night. Let's not forget the stinking tripod, I hiked Yosemite and the Sequoias last summer and I have to tell you it was tough in the heat. I'm already tired but can't wait, just might have to hit the gym for the rest of the month.
Any more suggestions would be greatly appreciated