Going on the big river boat is very cool to do, and you can sit for a few minutes to rest up. There are things to see on the Tom Sawyer Pleasure Island Tour, my favorite is the swinging suspension bridges. This is another top pick with smaller children without lines to wait, and no Fastpass to get. Just jump on, it is typically no waiting.
Where else can you ride on a boat as huge as this one. Oh my goodness that is a wonderful photograph of the liberty bell boat. You can tell it's four decks high, including the captains driving Chamber. This is very authentic, just like being on the Mississippi river in Louisiana. I like stuff like this, you just have to realize what's going on around you. I think most people just kind of focus on the rides and don't get into the little things, the nuances of Disney. When you get off the Boat Ride why not head over to the Frontierland Shooting Arcade.