Re: Advice on filling fly box
SGF, it's interesting to read your post. One of the presentations at the Pleasanton Fly Show today was by the Tenkara guy, and Tenkara says you can get by with just four basic patterns, that it's more about presentation than pattern. I don't know that I'm buying that, but I like to keep an open mind on just about everything, so I'm going to watch my stepson fish the Tenkara method and see what happens.
For a three-day trip, unless you are fishing really light tippets, fishing for really big fish, fishing where you will be losing flies to snags constantly, I don't think you need to get too carried away on the quantity.
Looking forward to hearing your trip report a month from now.