Beaver Fest is the only time to run the Moshier Falls section, and it gets very crowdy... The 2 other weekends offer releases as well.
Taylorville releases: September 3, 5, 10, 24, 25
Eagle releases: September 4, 5, 10, 24, 25
Moshier release: September 4.
I'd go more than once if possible! --C.