I looked into this very thing once when we were shopping for our boat. We lived in Dallas and it was an easy way to show Ann a big Hatt in the FRP, if you will. It was a Hatteras 53ED that had spent its whole life, some 20 years, on Lake Texoma, and it was far from the biggest boat on the lake. You have two choices: truck it all the way down to Houston, or wherever (some very tricky routing involved for that particular boat) or have it taken a much shorter route to Tulsa, and take her on her own bottom down the Arkansas River. The latter was much cheaper trucking cost wise, but then you had to figure in boat fuel costs and facilities for recreational boats are very few and far between.
Any of the big marinas on the lake can help you out. Fresh water boats typically come at a premium.
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"