I realize this thread is old, but checked it out based upon the 5 star rating. Great reading!
I'm with the post that opts for standing. I'm not sure if it's my asthma and being somewhat compromised I would assume... but that sitting solidly in the saddle spinning the granny gear just kills me.
On my last ride, I did 8 count standing intervals. Then back to seated. Repeat. I was careful to watch my HR to not wear myself out completely before I made it to the top.
It certainly does make the hill go by faster too.
