One advantage to a park hopper.
1.Lets say you decide to go to a EMH morning hour at a park. You are there early, get to do a lot of attractions, and around noon the park is very busy. You are tired so decide to go back to your Disney resort, or go to another park.
2. Maybe you rode something you want to do "1 more time", but it's in another park. You can do it!
3.There's a restaurant you've always wanted to eat at, but it's in another park. You can do it.
4. You really want to see...Fantasmic, Wishes fireworks, Illuminations, but missed it cause everyone was tired. Now you can do back to that park with a park hopper.
And tho I know this is a big debate on the boards, I suggest you do not drive to Magic Kingdom. It is quicker to take the bus from your Disney resort to the park.
One thing many 1st times are amazed at is how big WDW is. Don't try to do everything there is to do. Unless you are staying for a couple of weeks(maybe more), you can't do it all.
Have a great time. How exciting.
