No need to skip a restaurant just because there are characters. If you let your server know you'd rather not see them, they can tell the Character attendant and the princesses will be MORE than happy to let you alone and visit the Guests who wish to visit instead.
The food at Akershus is too good to pass up for something silly that can be avoided anyway. Unless the cost is the issue. I wish it wasn't so pricey to eat there now because my hubby is a server there and we love the food!