The only major drawback (IMHO) is the darn mosquitos! They will just about carry you away if you're not careful, and since our little one is allergic to them, we didn't spend much time around the campfire.
For the first several years we visited, the lighthouse was closed for repairs, but in '07 it was open again. We enjoyed the 167-step climb to the top with Grammie & Grumps this year (who camped in the site across from us in their moho).
The interior cast-iron stairs are just beautiful. In these two photos, I'm looking up. Notice the steel reinforcements that have been added to the original stairs.
In the second photo, you can see the iron rings that support the landings of each segment of the lighthouse.