World of Color Dessert Party

I think this will be a good idea for my family gathering. My dad will be in an electric scooter. My niece will have had a baby approximately 6- 8 weeks prior to the trip. My brother-in-law will have had surgery on his foot 2 months prior to the trip and will probably be on a scooter. This guarantees that they all get to sit down.

Has anyone done this before? Will the seats be good? How are the desserts? Will we be able to do any celebrations like we would at a restaurant? I usually do the World of Color dining package at Wine Country Trattoria, but you have to stand in that reserved area.