Can you leave anything in the lake permanently? If so, how about an old ratty trailer that you can pick up for a couple hundred bucks. As long as the bunks are OK and are a fair match to your hull it might work. The stern of the boat will likely float anyway.
The foam pool lounge mentioned above or a kid's foam skim board would be good, simple options.
2005 X2, Viper Red, MCX, OJ TZ-X5 prop, PPass, rear 750 sacs, KGB, IBS, Bennett Wake Plate, custom wake shaper
(previous) 2001 X5, 1991 TriStar 190