I've only ever booked with Dollar at MCO, love going right to the garage to get my car as a Dollar Express member. I am also an Alamo Insider: if I book through them can I also go right to the garage? I despise those lines at the car rental counter!
If you are already signed up for the Alamo Insider program, the steps are as follows:
-Login to your Insiders account go to the "online check-in" option of your reservation (we usually do this a day or 2 before arrival day).
-You will add Credit Card info and any additional options that you want (second driver, LDW, car seats etc)
-Once complete, print the paperwork and take it with you. (you can also just show the check-in confirmation email on your smartphone to the gate attendant but I'm old school and prefer to have a "hard copy")
-When you arrive at MCO, grab your luggage and head out to the Alamo area of the garage.
-Find the aisle of the size of vehicle that you have reserved. Don't be surprised if you see all different kinds of sizes in the aisle you reserved, you can take anything from the aisle that you reserved at no additional charge.
-Pick a vehicle from the aisle and load up. Keys are in the vehicles.
-Drive to the exit gate.
-Hand the gate attendant your paperwork (or show check-in email on phone), Drivers licence(s), and Credit Card you used to do the online check-in.
-The gate attendant will verify all your info, scan the vehicle out and open the exit gate.
-You're on your way.
-Enjoy your vacation