This is a great thread. Reading the advice of people with experience is invaluable.
Regarding the comments from acres per second and camp guy, if you're new to tubing, you should be aware of the terrible accident that happened at Lake Kanasatka last summer. It is sadly a perfect example of why the driver is so critical when pulling a tube (more so than a water skiier) and where the whipping effect can be dangerous.
http://www.winnipesaukee.com/forums/...ight=Kanasatka