Having been there just last week- pulling a stacker could be very challenging. You probably could pull into the park and circle thru the tight streets and come back out on Jenkins Rd (only way to get in and out) to position your stacker on the side of Jenkins road for parking. There is also a boat ramp that you could attempt to back into and turn around -however that would not be my preference.
Lots of large RVs and fifth wheels are in the park so apparently the trees have not kept them out. Hilton Head is an island of trees – lots of trees, Everything is either under a tree or behind a tree! Good Luck!
Hwy 278 is so busy its almost impossible to pull out on 4 to 6 pm.