A lower-Caddo float needs more planning than a quick swim stop.
The stretch from Glenwood toward Amity can be part of the bigger Caddo River story, but it should be treated as a float-planning route, not a casual “pull over anywhere” river day.
Use Glenwood for outfitters, rentals, shuttles, and current river advice. Use Amity as the quieter lower-Caddo connection and a place to stop after the trip.

Do the unexciting parts first.
The boring details are what keep a float from turning into a mess: water level, weather, access, parking, shuttle, and time.
This is not the beginner default
Most casual visitors should start with Glenwood outfitters and current local river advice. The Glenwood-to-Amity stretch makes more sense for people who already have a shuttle plan and understand legal access.
Plan the take-out first
Do not put in until you know where you can legally take out, where vehicles can park, and whether the route fits the water level that day.
End the trip in town
If the route brings you near Amity, build in a meal, drink, or square stop. That is how river traffic starts helping the town instead of just passing beside it.

The river can feed Amity if the route is useful and respectful.
The river does not need more careless use. Amity needs thoughtful visitors who know where they are going, respect the water, and spend a little in town while they are close.
Put Amity into the plan before people head home.
A float route that ends near Amity pairs naturally with food, Slate Rock, the square, and future market days. Make the town part of the route before everyone heads home.