Trip to Montana 07 - Need advice!!

Hi all, Im planning a fly fishing trip to montana pretty soon. I can
go for about any week between the middle of august and the end of
september. A little background - Ive fished in Colorado for 15 years,
and been up to the Madison river area twice - thats the area I want to
go again. I'll be driving.

My questions are -

1. What week - (I MUCH prefer dry fly fishing)
2. Should I stay at the Madison river all week or try Yellowstone,
Galaltin, Beaverhead, etc?
3. It has to be cheap. I dont mind camping, but would also like a
shower and a bed now and then. Any suggestions there?
4. This trip is all about fishing - maximizing time on the water, no
distractions like sight-seeing, etc!!

Thank you all in advance - this will be the last fishing trip Ill get
to take for a while so Im hoping to make it the best

Feel free to post or reply by email.

2. Should I stay at the Madison river all week or try Yellowstone,
Galaltin, Beaverhead, etc?

Be advised that due to warm water conditions Yellowstone has limited
fishing in many streams. See their site to confirm dates and times.

http://www.nps.gov/yell/parknews/0739.htm