I'll be there during many of the same dates - yeah!!!
Anyway, I've been to a few of the restaurants you list so here is my take on the restaurants I've eaten at:
Chef Mickey's for Dinner - I did not like this and won't go back (sorry! I know there is a big following for this place!). I thought the food was below average, the restaurant was chaotic and messy, and the character interaction was only ok. My kids LOVED this place however (they were 5 & 6 at the time) but my husband and I didn't.
Ohanas - My family loved this restaurant. We felt the food was really good (and I didn't think I would go bananas
for the dessert, but wow, it was terrific!) and we liked the games and entertainment they had for the kids (and us!) We did not have the most attentive server but we just made sure to ask for what we needed and he saw to it. We're going back here the same night you are but at 6:25pm
50s Prime Time - LOVE this place! I loved the food (fried chicken!!) and the interaction with the server. I could not get over how cool the theming was with all the 50s decor and my whole family had a good time here.
Cape May Buffet - We had an ok meal here. Some of it was good and some of it was not so great. I felt that the seafood was a little tough and dry and while the soups & desserts were good, I wasn't impressed with the main dishes.
I can't tell you about the other places because I've never eaten there but we are trying out Biergarten ourselves this September!