So what evidence do you have that Lincoln "new" about it? I'm not denying that the activities happened, after all Crenshaw was prosecuted for his criminal actions. But that's a long way from demonstrating that Lincoln was aware of his actions or approved of them.
There is more research on the matter, which you can start perusing at the site already provided.
The simple breakdown (and I will try to keep it simple, since your fascination with a simple typo demonstrates that you are easily distracted from factual matter) is (from the article):
"Three different lines of the Crenshaw family recalled the Lincoln legend as well as a fourth, unrelated family. Comparing the legends, the Crenshaws apparently hosted a party at Hickory Hill in honor of the debaters. Typical of the social traditions of that time Lincoln spent the night at the house, as likely did the other out-of-town guests."
There is also a considerable amount of other information that suggests the link, including Lincoln's backing of a bank bill where Crenshaw was later appointed as head of said bank (by a Republican Governor, also an acquaintance of Lincoln) the fact that Lincoln's visit to Gallatin Co. for debates is not in dispute and that the Crenshaw soiree was at the same time is not in dispute. The idea that Lincoln didn't a) stay there, it being the best accommodations in the area b) stop by, it being the politic thing to do, or c) be aware of the local reputation of the Hickory Hill estate are all equally ludicrous.