first masters meet

I'm going to be attending the Maryland Masters Winter Meet next weekend and its going to be my first masters meet. I'm swimming 50 free, 100 free, 50breast, 100 breat, 50 fly, 100 fly. I'm not sure how im going to do but Im hoping for a few top times and I really want to get a masters top 10 time. I'm also going to try to posible get some virginia LMSC records for the 18-24 divison. The record for the 50 free is 21.45, for the 100 free its 49.89, and for 50 fly its 24.71. My top times are 21.83, 50.00, 24.59. So I got a chance at thoes records. I have a few questions about the meet since its my first time. Do I need to check in when i get there? How are the heats set up, is it base purly off of times or do they group the agegroups together in the same heat?