Hi, Lonna! One of my favorite restaurants in
all of WDW is Artist Point at Wilderness Lodge. Therefore, my
ideal itinerary pertaining to your evening would be to have the sitter come at 5:30 p.m. (with dinner already in the room for the kids). Then, make an
Advanced Dining Reservation for the adults at Artist Point for 5:45 p.m. After your meal, take the boat back over to the Magic Kingdom around 7:15 p.m. and find your place on Main Street USA in time to watch Wishes at 8 p.m. Finish your evening by strolling by the castle to get your picture made together and take your time wandering through The Emporium for some uninterrupted shopping.
If you want park time without the kids, I would have the sitters there at 5:30 p.m. (having already enjoyed a quick service meal in the room), and take the boat over to the Magic Kingdom to enjoy some attractions an hour or so before Wishes. Make sure you grab a Toll House Cookie Ice Cream Sandwich or a DoleWhip before settling down to enjoy the fireworks.
Have a beautiful Alabama day and a most magical vacation! Let me know if I can help you more!