M.L.
Go see Mickey and Minnie first- there is usually a long line to see them. Dumbo line gets pretty long quickly too. Get fast passes to the rides that allow them. Also, if you can, bring your own stroller. They do have stroller rentals at the park, but they don't recline for napping, and at 15 months, the little one will want to nap! You can bring food and drinks into the park, so you might want to bring some snacks in to buy some time while waiting in lines, or just to avoid the cost of buying at Disney! Also, go to the Disney store, and buy and pack some souvenirs. The ones at Disney are awfully expensive. Remember sunscreen and little motorized fans! Here in Florida, October is still hot. Have a great time!!!!