I'm sure they'll have fun, and the boat will be nice enough - by today's standards. It will undoubtedly be several steps above the usual commuter ferry decor that's normally found on short hop excursion boats.
I don't imagine it will be on par with the steamships that plied the Coastal areas and Great Lakes waterways during the first half of the 1900s, though.
For example, this is The City of Detroit III.
She was a side wheel steam ship that ran between Detroit, Cleveland, and Buffalo from 1912 until her retirement in 1950, when the company that owned her went out of business. Here is a photo of her pilot house.
And here is a view of the Grand Salon:
You won't see details like this on any boat ferrying people around in the Great Lakes area today, I'm pretty sure.
Pretty freaking amazing, yes?
The entire ship was sold for scrap and dismantled in the early 1950's, with the exception of the Smoking Lounge, also known as the "Gothic Room". It found a home at the Dossin Great Lakes Museum. Lots of gorgeous carved hardwood and stained glass. I can imagine gentlemen of the day relaxing while they smoked their cigars and pipes, perhaps enjoying a bit of brandy.
B&W pictures via Shorpy, and the Library of Congress Archive online.