The Ark is the oddest boat on Lake Travis. It sort of looks like a 2-story double wide trailer with no walls. I've been out on this boat a few times. It can get windy on the lake which means cool weather. Also, Texas summer weather can be unpredictable so I always bring a waterproof windbreaker and an extra long sleeve shirt just to stay comfortable. If you don't live here, and it's 100 degrees during the day, remember that a thunderstorm can bring 70 degrees, wind and rain with little notice. The marina and the dock where they keep this boat can be a little hard to find, take a map with you to get to the boat party.
Pros: Big party barges hold a lot of people
Cons: finding it is kinda hard the first time