I share RedCorvette's pleasant memories of the Southern Belle. I have no idea whether it's based on an actual steamboat, but it sure was an attractive and fun kit.
I'll also be happy to see the Lindberg Clermont again. I would, in fact, be glad to see it in its original motorized format. I never thought I'd say such a thing, but the motorization method in that particular kit was really ingenious. All the gears, the piston, and other major components of the scale steam engine were exposed, and moved realistically - getting their power from a little Mabuchi motor hidden under the foredeck. If you really looked, you could see the tiny worm gear arrangement that connected the motor to the scale mechanism, but if painted carefully the whole system would look pretty convincing.
There are no plans of the real vessel's hull (though there's a patent drawing that shows the steam plant), so the manufacturer should be clear of any criticism based on questions of accuracy. I also remember the nice crew and passsenger figures. I think this kit may have a niche in the history of the hobby as the first ship model kit to include a scale figure of a woman. (At least one later kit, the Airfix Mayflower, now shares the distinction.)
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.