A few years ago I did a couple of seasons on a two-deck party boat that could accomodate over 200 passengers. They placed me in the salon on the first deck, right over the engine hatch. Talk about noisy. The generator did a pretty good job, but there were occasional dips where the lights dimmed. Fortunately no damage was done to my KB's, but I was told that these dips are murder on equipment.

The tour line left and has been replaced by another which has a much newer vessel and more modern system. I have only played it once, but it was no problem.
Eddie