Welcome!
First thing- if you are planning on staying on property then the packages that are supposed to come out on 7/11 will be helpful. You will know if free dining is offered and any other deals.
Next, helpful for planning your stay are the Extra Magic Hours - once again if you are staying on property. During EMH, if you didn't know, the parks are open earlier or later than normal for the guests staying on property. They help get the most out of your time and the parks are less crowded. EMH can be found on the main Disney site under Parks & are posted about 6 months ahead.
That said, a couple suggestions for the park planning.
AK- go there early, am EMH if possible, and do the safari -the animals are most active in the am. The kids will love it. My 3mo daughter loved the bumpy ride - if nothing else LOL
MK- take advantage of the pm EMH which a lot of times is 8pm - 12am. This will let you go to MK in am, less crowded, take a break mid-day at resort pool or nap, and then go back for the afternoon/evening with rested kids.
Enjoy your planning.