I have a Mountainsmith Lumbar pack that I have used fishing, shooting, camping, surveying, and every other manner of use over the last 10yrs. The bag is still in good shape and going strong. It has straps I can roll a coat up in and a shock cord I use to hold my net. I think they are great the nylon dries quick and keeps all but the most torrential downpours out of the pack.

Link: http://www.mountainsmith.com/products.asp?categoryId=4

I have a classic series tour.

Adam

Standard Disclaimer: I have no interest or affiliation with the company, but I have been so happy with mine. Best thing I ever bought (except fly rods and motorcycles).