[jimwick]

We have a core group of 5-6 mentors who are active all year; of those one or two are parents.
During the build season there are perhaps another 5-6 who are pretty regular; some of them are parents.
Another 10-15 adults help out in some capacity, such a helping with lunches, transportation, fundraising, etc.

This varies from year to year as students come and go; their parents usually come and go accordingly.