From the Mashpee Rotary:

Take Route 28 south for 3 miles on the right hand side (just after Honeydew Donuts) in the Merry Meadow ByWay/The Barn Plaza

From the Hyannis Rotary:

Take Route 28 north - ½ mile after Route 139 intersection on the left hand side in the Merry Meadow ByWay/ The Barn Plaza