I really would not consider Blythe Landing
(http://www.charmeck.org/Departments/Park+and+Rec/Parks/Parks+By+District/North+District/Blythe.htm - broken link) a good place to hang out. It does have volleyball courts, outdoor grills (check for red flag warnings) and a walking trail that is mediocre at best.
(http://www.charmeck.org/Departments/Park+and+Rec/Parks/Parks+By+District/North+District/Jetton.htm - broken link) is nice they do charge per car load to use the park but they do have walking trails, bike trails, a beach but you cannot wade or swim, wedding gaezbos.
Ramsey Creek Park
(http://www.charmeck.org/Departments/Park+and+Rec/Parks/Parks+By+District/North+District/RamseyCreek.htm - broken link)
Is a great park I have used this as hangout spot when I need a break from boating. Trails, horse shoe, Dog Park, volleyball, and trails.
Lake Norman State Park
(http://ils.unc.edu/parkproject/visit/lano/do.html - broken link) is a large park on the north end of the lake near Troutman. Lots of trails, camping, hiking, biking, paddle boat and canoe, and swimming (only park that allows swimming)
My favorite park is Latta Plantation Preserve
(http://www.charmeck.org/Departments/Park+and+Rec/Inside+The+Department/Divisions/Stewardship+Services/Nature+Preserves/Latta.htm - broken link) it is a huge park on Mountain Island Lake about five minutes from Blythe Landing.
you can canoe or kayak one of summer past times, hiking on natural trails, bike trails, volleyball courts, horseback riding lots of cookout facilities great views of the lake plus you can view Latta Plantation
or Carolina Raptor Center
Due to low lake levels due to the drought your water activities may be limited or restricted.