I agree with your thoughts on SAB. I saw a 5 year old having trouble hanging on to her tube while her mother with baby sister together in another tube floated with the current around the corner and out of sight. She was struggling and complaining to mom, but mom with baby couldn’t figure out how to stop and help, before she sailed ahead around a corner. With mom out of sight, I watched a few more seconds as the 5 year old was having trouble holding on, saying her arms were hurting. So I told the lifeguard, who hadn’t noticed the trouble brewing, that the little girl needed some help and that I did not know the child. She blew her whistle and jumped in, and helped the child. Now you have a crying child who is alone and a lifeguard who is not a babysitter. It took a few minutes, but the mom heard the whistle, managed to get out of her tube with baby, (not easy) and walk back. I was glad to see that mom then decided to leave the lazy river with her children. You really need one adult with one young child in the lazy river. You cannot manage two. Not safe for littles.