I've done a workshop for a couple of years on how judging works at the Regionals. Here is the ppt:
http://www.mdfirst.org/images/storie...udging_101.pdf
Lots of information here. This is meant to be a presentation so some of the slides may seems a little weird. It is intentional.
Also includes links to a call conducted by Global RCA judges, with advice given.
In general, judges will try not to give out 2 judged awards on the same day to the same team unless there are not good options, but as already noted this does not include performance-based or pre-judged awards.
My overall advice is: understand what the awards are given for (do some homework) and help the judges in the limited time you have with them understand why your team deserves to win this award.