I have an 8' Water Skeeter Snohomish that i got from oregonfishing.com. it's a $600.00 boat but the price was knocked down to $420 just because it was out of the box and on the sale floors. Try and find a deal like that. I have only had time to run the middle Sol Duc so far, and i had no problems. I wouldn't want to try it when the water is really high though. It will probably be a low water, summer time boat. Definently do not go under 8'. I cannot think of much more other than that.
Hope this helps some.