When you buy tubes, check out your filling nozzles. If you have a tiny nozzle, you'll be there all day to fill it up. You'll be there all day to let out the air. I like the high volume manual air pump. The trick to inflating quickly is multiple pumps. (https://www.amazon.com/WEIFA-Mattress-Universal-Inflatables-Plastic/dp/B07FNRRYG8/ref=sr_1_1_sspa?keywords=high+volume+air+pump+inflatables+manual&qid=1564660874&s=gateway&sr=8-1-spons&psc=1)

Get the biggest nozzle possible. It's worth an extra $ for quick release. Girls tend to like tubes with a solid bottom. Boys tend to like open bottom tubes. A solid bottom tube works great for a spare and for cooler transport.

Sunscreen...sunscreen...sunscreen.

We've been twice this year. We'll go again as the nights cool a bit more. There seemed to be more limbs and trees this year or maybe water was lower. I got scraped and bruised up pretty good both times. Be careful of underwater hazards.