I called the other day and they were able to put us in for May 2nd no problem. I wouldn't think you would have to make the reservation too far out. Just call them directly when you know the date. I would imagine a Fri/Sat/Sun would be busier due to bday parties. They also accept walk-ins if they have time. Someone told me they leave one chair always open for walk-ins, but I am not sure if that is rumor or truth! Its a blast! My DD did it in January (see the photos below) and the hair do stayed in for 4 days! I just kept washing her bangs and the top pieces of the hair sticking out. It was very easy to take it out and did not ruin her hair at all (she has waist length blonde hair with barely a split end in it!).