Lake Wilderness park has on duty life guards, a fenced in swim area complete with dock, and lots of picnic tables. Lots of area to roam around, including a trail that goes around the lake. The lake is plagued with milfoil -- a real downer. Rafting, kayaking and canoeing are allowed -- there are limits on motoring, but you need to bring your own. Two bathrooms available as well as a picnic shelter. Plenty of parking. Easy access off Maple Valley highway
The associated lodge is a great place to have a wedding or meeting. Plenty of tables, chairs, kitchen available, and all the fees and requirements are explained well on their site or in person including how to get a marriage license.