MelJade: It really depends on how old she actually is, whether a very young two or an almost three. If she's within 2 or 3 months of being three and is pretty mature for her age AND completely potty trained - which includes wiping and dressing, you can talk to the Counselors in the club about allowing her in on a trial basis. They will talk to you and your daughter and make the decision.
Also, you can take your DD to the Club at any time if you stay with her and are responsible for her. If she's too young to register in the club, this might be an option for some of the activities although you couldn't leave her.
Key answer is TALK TO THE CMs. They want your whole family to have a MAGICal or WONDERful vacation and have lots of experience in evaluating kids.
If she's a young two, I would just plan on using Flounders for the times you want adult time.