[SteveFromNY]

I think the fastest way to get there is to spend a few bucks on tolls.
Where you are on 192 looks to be just east of 429, which is the Daniel Webster Western Beltway. Nice new toll road that will connect you with the Florida Turnpike - north. You can take the turnpike to exit 304, then 301 north to 466-A. Make a right (east) then a left (north) on Buena Vista Blvd or Morse Blvd. Either one leads right thru TV. Lake Sumter Landing is a few miles north from 466-A. If you cross rte 466, you've passed LSL. Watch for 466-A, and remember there is also a 466. Both run east-west, with 466-A the first one you come to along 301.