I heading up to Pittsburg, NH next week for a family vacation and hope to get in some fly fishing in the evenings. This time of year is it better to bring a 9 ft 5 wt or a 7.5 ft 3 weight? I've neven been.

Also any guidance/links on flies or places to fish would be great. I hear that fishing is strongly flow dependent.

Thanks in advance for your help.
-John