Hi Kim,
Thank you for visiting the Disney Parks Moms Panel. You are certainly welcome to park at Disney's Polynesian Village Resort during your meal reservation, but all-day parking is reserved for Guests of the Resort.
However, as a Guest of Disney's Animal Kingdom Lodge, you may park for free in the Magic Kingdom parking lot while you enjoy the park and finish up your day with a delicious dinner at
'Ohana. You can actually walk to the parking lot from the Resort hotel if you wish or take the Resort Monorail to the Transportation and Ticket Center.
Another option would be to ride the bus from Disney's Animal Kingdom Lodge to Magic Kingdom park, take the Resort Monorail to Disney's Polynesian Village Resort for dinner and then back to Magic Kingdom park to return to your Resort Hotel by bus.
I hope this gives you a few options, Kim. Enjoy your magical vacation!
Andrea U.