Might want to reconsider that most expensive package. We did the the top package the first year and basic package the second year. I'm not sure what we missed out on except saving $100 (ish). Yes she didn't get the tshirt but the shirt still fit from last year, so no biggy. If you are getting the memory maker then you are paying twice for the photo shoot after by getting the top package. Think about that! You can always change that package so don't let them tell you you can't!
We did a BBB that was running on time and another that was behind over an hour. So it depends on what time of year you are coming and also what time of day. Obviously the later in the day, that longer they are running behind. Also takes a solid hour and up to an hour and half. Maybe two if she is doing the photo shoot and they too have a line. So I would allow for 3 hours to be safe. You will need that much time if they are running behind, time for BBB and time to get to your RESSIE.