Anyone done RC Lighthouses of Maine Cruise Tour?

Going on Grandeur end of July and trying to see some lighthouses on the Portland stop. Leaning toward the Portland Discovery Land and Sea but then I read the RC Lighthouses of Maine tour goes to Bug Light, Sprint Point Ledge, and Head Light. Its 3 1/2 hours long. I'm guessing its a tour bus but does anyone know if it just drives by these lighthouses or do you actually get to get out at each and walk around?

Another question!! Does anyone know how to find out the time for the excursions? Website excursion description doesn't say anything except length of time.

In my opinion, Bug Light isn't much to see. Spring Point light isn't much either, but you have to walk out the breakwater to get to it, so its not a drive by. Portland Head is the only light of the three that is really neat. Given the 3.5 hours, you will definitely get out of the bus and be able to walk around.