Well, figure out what you need for the coldest day, the warmest day, and the wettest day. Then add a few pairs of clean underwear. Presto!
The Windstopper Tech FleeceThe key is to layer. If I were going on a ten-day drip during the summer, I would start by deciding what I would need when it was warm. That would be a light synthetic T-shirt ( Capilene 1 T-shirt, $39), and a light pair of shorts ( Amphi Shorts, $50).
Temp drops a bit? I put on a warmer layer, like the long-sleeve Atlas Half Zip ($65) for the torso, maybe the Cap 1 tights ($40) for the legs.
Cooler still, add a fleece jacket ( Windstopper Tech Fleece, $185), and some pants ( Gamma LT, $169). I might also add a down sweater, such as 聮s Ex Light Down jacket ($160). That聮s for here in Washington聴maybe not so good in humid Minnesota. Add instead a heavier wool layer.
Then, when wet, some rain gear. 聮s Shuksan ($299) is fantastic; they聮d go well with 聮s PreCip Full Zip Pants ($90), which aren聮t as breathable as the Shuksan jacket but would be fine when sitting in a boat聴and could double as an extra warm layer.
Then, as I say, add some changes of underwear, and you聮re off!