When we did it you could take either the ferry boat or a bus back.
I though the boat ride would be "prettier".
Your boat may not be like ours, but I mean they danced and drank for 4 hours! Now I can drink some beer after a ride, but normally I relax a bit--it was like these folks never get out!
Then again, I should not judge. I just found a quieter section of the boat. It was pretty pulling into Boston Harbor (for someone that is not from there).
I enjoyed the 1st day of teh ride the best, more scenic and rolling hills.
Overall I enjoyed all.
K