Thanks for all the info.
Is there bus service to each of the parks from the resort or will a car be necessary?
I spent 5 days at Shades beginning of October and I can tell you that guests of Shades have the luxury of either riding Shades transportation to and from the Disney parks, walking 5 minutes down a path and across the street to the Polynesian to catch a monorail or Disney bus to a Disney park / water park / Downtown Disney, or walk a little further through the Polynesian to the Transportation and Ticket Center for a trip to Epcot.
There is also a path between the Polynesian and the Grand Floridian.
Inside the lobby of Shades, there is a sign with bus routes and times of operation. Shades takes care of its guests. I think of the Shades Disney buses sort of like base buses -operating on the half-hour to / from your destination.
The best is that you can mix and match - take the Shades bus X park, visit the park, then return on Disney transportation (Polynesian Resort), or vice-versa, whatever is most accommodating for you.
On top of that if you are interested to visit SeaWorld or Universal Florida Studio / Islands of Adventure, it will cost you and each member of your family $10 roundtrip on a van provided by Shades.
You really don't need a car to rent to get from here to there. You are on Disney property and are treated as a Disney guest. Staying at Shades provides you and your family to a little bit more, a little bit extra.
If you do decide to rent a car ($5 parking a day in multi-level indoor garage), the best is to not use the rental car while on your stay. If you decide to drive instead of using Disney-provided free transportation, you will have to pay to park your car at the park ($14-$18).
As for getting to Shades from MCO Orlando International, best service is to take Mears Shuttle. $34.00 roundtrip per person.
As for reservations, are you asking for reservations to Shades eateries? You really do not need a reservation. If you would like to schedule a reservation for a Disney restaurant, the best is to call Walt Disney World to help you.
Better yet, before you do anything, call Shades of Green. They are the point of contact for all things military and Disney. They will take care of you. Call Shades at 1.888.593.2242.