Canyoneering would be a fun alternative. We'll only have maybe 6 youth and likely 3 leaders. I don't know that I could handle canyoneering with my bum knee but would like to try and find an affordable option to do some repelling down there. My youth definitely skew less towards athletics generally speaking but after talking to them last night about it are excited to do two days on the river. I think we're going to spend a night or two before we go down also making pvc water cannons too. I just hope that its warm while we are there (it'll be June so I'm not that worried) because I expect the water to not be.