We had a 6:00 ADR at Park Faire and made a 4:00 appointment (two girls, who got done back to back instead of at the same time). We had plenty of time. I think BBB closes at 5:30, so the last appointment might be at 5:00. It depends what kind of transportation you have. We had our own car and were staying at the Poly, so we drove back to the Poly and took the monorail to the GF. If you don't have your own car, you would have to wait for a bus to the GF from DTD - I'd allow at least an hour for transportation if you take the buses.