Some of my group used
FL Tours last fall. They were 4 adults and two babies. Car seats and a grocery stop were included. Another family rented a car at MCO and dropped it at the Dolphin car rental count. The worker in that group travels extensively for business and got the rental nearly free with reward points.
To get back to MCO, I took Uber with two others and we paid $35ish one way.
If you need towels and don’t have a room key, there are plenty of them for the taking over at the pool by the Swan.