I really want to take DD (2 1/2) to Ariel's for lunch one of the days we are there but DH doesn't want to go. I'm thinking I may sneak off while he does big rides w/ DS (5) and take her but I'm not absolutely sure it can happen. Would it be possible w/out PS to get in for an early lunch?

He could still end up having no desire to dine with the princesses, but on the off chance that he will decide to go, make them for 4 people. If he and DS decide not to go, when you check in just let them know your party size has changed to 2-- should not be a problem.