I lived 1 mile from Lake Wilhelm for a year and it was my favorite spot - I would eat lunch on my favorite dock and take the bike trail the whole way around on a Saturday - Ive kayaked on this lake many times - The fishing isnt too good, but it is a gorgeous relaxing place. See my pictures...
We had a pontoon and love spending Sundays there. It was a very nice time out. The place was clean and people wear nice. We spent my first Mothers day there.
Great paved trail for biking or hiking. Appears to also offer a nice beach