It really is that easy.
Which is why we love it!
But, I will add this advice. Make sure you check out the show times early in your trip and make a plan for the ones you want to hit. We were having so much fun with rides that we let ourselves get short of time and tried to cram several shows into one afternoon. Yeah... that is a bit hard to do.
So, just make sure you spread them out a bit, one or two a day, and you should be set for everything else.
Other tips, if your son is young/small enough for Pteranadon Flyers, make sure you do that early one day. It's fun, but VERY slow to load and doesn't have express so it can put a kink in your plans if you don't do it early. Seriously, it's so slow and creates such long lines, that they created the "height limit" to control the crowds. Yikes!
The Jurassic Park play area is a lot of fun for older kids. You can really explore (i.e. get lost) in there. It's great and you could spend a good amount of time in there.
My two were 8 and 10 on our last trip, and they also loved the Ball Pit behind the Curious George play area. (Okay, dad and I liked it too.) We had a foam ball battle to the death in there and stayed much longer than we anticipated. So, if that's something your family would enjoy, save some time for that.
Make sure you check out the Talking Fountain near the Sinbad and Poseidon shows. That's a hoot.
If you want to try a butterbeer at WWoHP and the street cart is busy, try the Hogshead or Three Broomsticks. Trip reporters have posted that there is little to no wait at these locations.
As another poster mentioned, if you are interested in Ollivanders, do this FIRST during early entry, then move on to Forbidden Journey. It's a short show, but has limited space, and a line builds quickly.
And don't forget, pool hopping is encouraged at the three resorts. Check out the kids play area at RPR one day, the slide at PBH another, or enjoy the music at HRH.
Enjoy your trip.