Greetings!! I am brand new to this email list, and am very excited to 
be part of this community.
I have looked through some of the postings that concern baking at 
"high altitude".  I live at 5,000 feet, and have made bread using some 
of Ken Forkish's formulas as well some from a couple of Peter 
Reinhart's books and Bien Cuit by Golper and Kaminsky.
While the breads have turned out fairly well (I'm a newly-returned 
bread baking enthusiast, and my standards for "fairly well" are likely 
a wee bit low), they have been a tad dense, much like the baker.  :) I 
use active dry yeast which I rehydrate - haven't quite decided to go 
the instant yeast route.  I grind my own flour using wheat berries 
both from our CSA and from Breadtopia.
While I have suspicions about the way I am using the active dry yeast 
in recipes that call for instant yeast, multiplying the called for 
amounts by 1.25, I also am wondering if the 5,000 feet elevation may 
have something to do with this.  While not really high altitude, I 
suspect that it's enough, both in terms of barometric pressure and 
lack of humidity, to have some impact.
This is a rambling post with a fairly amorphously posed question.  But 
if anyone has any feedback on what I might try to have bread be a bit 
lighter in density, I would be grateful.  Thank you all very much!!
Flour power,
VelkySyr