I recommend going down at least a day early. 2 feet of snow here last night.
Our first cruise,(4 adults) we booked the Radisson for a Sat. night before our 4 day Wonder. We arrived at MCO around 11 am and had Tiffany Town car pick us up at the airport and bring us to the Radisson. This was nice, but the weather was cool and without using the pool there is really not a lot to around the Radisson. The Radisson is very nice - stayed in a suite that slept 4. 1 King bed, sofa sleeper in the other room.
Our last cruise, (6 adults) we flew down on Friday night (got much better air fare) and stayed at the Sheraton (North of the airport) on points. This was very nice. The Shuttle (free shuttle) picked us up at the airport and we took the 5 minute ride to the Sheraton.
On Saturday am, we took the Sheraton Shuttle back to the airport to pick up the rental van - verry easy. We went back to the Sheraton to pick up the rest of the group. We headed to Kennedy Space Center and then spent Saturday night at the Radisson. Suite slept 6 - 2 king beds, one sleeper sofa in the other room.
It was nice to have the rental to get around on Saturday.
Sunday am, brought the rental back to Budget and they brought us back to the Radisson for the 10 am shuttle with the rest of the group.
Will do the rental again next time.
Added: And we had Tiffany Town car pick us up at the port to take us to WDW after the cruise both times.