Thanks for the replies.

I shoulda been more specific in my OP.

There's no problems with altitude sickness, or staying at altitude. Once I get to my spot, I'm fine, and acourse, comin down isn't a problem.

What I'm trying to do is gain a day up there.

Usually, I like to take a day hike the day before leavin on a backpack trip, to get the altitude in or out, whichever.

There's no problem with a daypack.

But hittin the trail, with a backpack loaded for a week, slows me down, and my stop is about 12 miles, climbin from 7-10,000 feet, a place I can reach in one day if I was acclimated, but just can't hit the first day out.

So, I'm wondering whether the extra O2 from the concentrator would give me the extra I need to be able to roll up to the trailhead, and hit the base camp the first day. Kinda like a turbocharger.

Would only need it when carryin that initial load, and if it could work the 1 pound wouldn't make a difference.

Also seems like it could help packin an animal out, if I ever need to.