I stand corrected about access to the northern tip of Folly is. This is from www.savethelight.org :

"Here are specific directions to find the Morris Island Lighthouse:


TO FOLLY BEACH. If northbound and before reaching the Ashley River bridge, turn right off US 17 into SC 171. If southbound and a short distance west of the Ashley River bridge, turn left into SC 700. Continue on SC 171 to Folly Beach and, at the second traffic signal one block before a hotel at the end of Center Street, turn left onto East Ashley Avenue. Continue for 3.3 miles to the entrance of an abandoned Coast Guard LORAN station. Although vehicular traffic is denied entry by a locked barrier, pedestrians are allowed to walk the 0.25 mile to the beach for a spectacular view of the lighthouse.


Across Charleston Bay one can see the towering Charleston Lighthouse on Sullivan's Island. At the gate's turnaround there is free off-road parking. On weekends this parking lot is usually full. If it is, park on one of the side streets and walk the short distance to the station's entrance."

So it seems that one can walk out to the tip of Folly & get a great view of Morris Island light!

Savannah Brian