Awesome. My first year was a group of 20. It was a pleasant number . . .
If you've got 20 people, a dome and a couple of monkey huts are not
too much (in my opinion). Domes feel more open and social, monkey huts have a narrower view of the outside world and are good to retreat to with fewer people. It'll be nice (and sanity-preserving) to have options. Just stake everything down extra well. We've had uncommonly good weather the last few years, but the wind can be merciless.