I fish the Black Hills too. I bought a WW Griggs 3 wt. because it's short and is useful in some of the streams where there's lots of fly-snagging growth. It can be difficult to handle in the wind.
I use the 5 wt. for open fishing, when I need more distance, and when I'm floating on Deerfield, Pactola, and Sheridan Lake.
My suggestion is to get the 3 wt. and use what you feel most comfortable in any given situation. There's lots of two rod carriers so hauling both shouldn't be a problem. I got a nice one for my last birthday at Scheels in the R.C. Mall.

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Elliott W.

I tie flies to give the fish something to laugh about.