Honestly if I had the money, the time, and lived way closer, I would consider going but I'll probably end up not doing so.
Sure, it's the ultimate hanging with MP experience ever, but still, why not making a concert and filming it?
A 3+ hour concert of just MP stuff with guests and that would be very awesome, or maybe he could perform two nights and record both, with each night focusing on different stuff, the first one going on proggy stuff (DT, Transatlantic, etc) and the second one going more metal focused, as well as placing stuff from other projects such as Flying Colors here and there.
I'm very sure that would be better, more accesible, and way cheaper for him than hiring this hugeassboat.