Tire tubes work great for moving lifts. I don't know what type of lift you have or how high your legs could extend to get it out of the water to enable you to get your swim raft underneath and then retract your legs to move. Tire tubes are pretty easy to submerge by yourself.
The going slow comment is easy to acknowledge, but difficult to do! Been there done that...and did it all over again, only in deeper water.
2003 Prostar 209 Sammy Duvall