The SF is consistently windier than most places as it is the path to a low elevation pass. 1-2 wt rods are fun, but they are really niche rods. Build your quiver from the middle out. I enjoy a slow 2wt on the SF most days, but if I had to get one rod it would be a 7.5ft medium action 3wt such as the LL or Superfines suggested already. At the risk of a "get the rod that I bought" response... Winston GVX 8.5ft 3wt with 3 weight (really 3.5) Mastery GPX has a lot of touch in close and can punch out bigger flies in windy conditions.