Friends Vaction Coming Up, We're Thinking Of Going To Branson. Things to Do?

So we're definitely wanting to fish, so we're going to get week licenses. We also thought about silver dollar city, but one of our friends is 400 lbs and is really only big in the gut. Would he have a terrible time? He loves roller coasters, but ever since losing someone, he gained a crap ton of weight, and even though he's lost some he still is really big.

Anyway....Is there anything else around that could be fun to go to/activities to do? While fishing is the main goal, we'd love activity ideas. (keep in mind, we aren't wealthy, so nothing to lavish...)

We want to do outdoor activities that aren't completely taxing and exhausting, but know there aren't like zoos or things around. So any ideas of places to visit/have fun at/eat at/etc. is greatly appreciated as a response. If you have follow up questions I'd be happy to answer.

We're planning on going early or mid July if that helps!