Yes you can park in the lot and in a handicap spot for 4 days. It's not far to the terminal. The airline will help you with a wheel chair if you request it when u purchase your ticket
You can park your car in the parking lot that is right in front of the Airport. And you can leave it there as many days as you need, for a small amount of money. The airport is very small, and you won't have to move long distances. Maybe you can try Google maps on your computer. Write the name of the Airport, and when Google find it, try to zoom in the place until you can see the details. Also you can use the Google feature where you take like a "little man" a put it in a place you want to search, and he will show you a 360° picture of your surroundings. If you do that right in the front of the Airport you will be able to see the parking lot, and have a better idea of the distances you will have to move. Hope this will be helpful for you.
I'm not sure about transportation but the garage is directly across from the entrance to the airport. You enter on the bottom and go up to the top it is only two levels.
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