Animal Kingdom Lodge is great. You'll love it.
If you are seriously considering changing, I'd switch to one of the resorts on the monorail (Grand Floridian, Polynesian, or Contemporary). It's much easier to get back to the room or the pool for a mid-day break.
You live in New York. Be seriously prepared for Florida heat in July. It's going to be HOT AND HUMID. Drink plenty of water, and take plenty of breaks. Don't try to rush it. You're going to hurt yourself, and wear the 13 month old out.
My advice to people who are new to the Parks is always the same. Buy one of the planning books (I like Birnbaum's "official" one, but the others are fine too). Go through the book and get an understanding of each of the Parks. Then make a list of:
- Things you must do.
- Things you would like to do, but it wouldn't hurt to miss them.
- Things you don't care about.
Then, wander the Parks. If you see that you've got extra time, do some of the things from that middle group. If you see that you're running out of time, do less wandering and make sure you are getting the big stuff. Remember- the 13 month old isn't going to know if you miss something on the list.
One thing you do have to plan is your Dining (ADR's). If you plan on doing any table-service meals, you have to make the ADR's (there are all kinds of threads about them here).
Finally, you mentioned that you've got your husband, your parents, and your 13 month old with you. You don't all have to stay together all the time! Maybe your parents can take the baby while you and your husband go out to eat. Maybe the guys can go play golf one day. Or you and your mom can shop at Downtown Disney while the guys stay at the pool with the baby. I think things like that take a lot of stress of family vacations.
Have fun planning!