There is a "front door" to the Hyatt; the limo driver will know where to park and will meet you either in the main lobby or right out front (the limo company will tell you). Frankly the Hyatt is a pain with a rental car, but you won't have that issue with a limo.
As to checking in at MCO is you stay at the Hyatt and have transfers--it is a pilot program with seems to be "sometimes" ...



