I would not drink from charter boat tank. (If watermaker, then depending on setup, can fill gallon jugs direct from watermaker).
If you set your itinerary up correctly, you can get "less crowded".
Indians is a day stop which should be limited to 90 minutes. Can hoover until one opens up. With a little luck, wait will be short, but should be able to enjoy Indians.
Call Bars where you plan to be to see if they have TV with access to channel you need. We have watched games on Anegada as well as Red Hook (STT).