I have done a lot of curl meets myself. It sounds like your meet will be a standing curl, youtube those videos, even though they say they are strict they are not perfectly strict. You have to master a little bit of swing in the beginning but try to hide it as best as you can, although be careful with that b/c given the weight you are curling they will expect you to be quite strict. Some curl meets are up against the wall. Make sure you know if you have to do that as it is MUCH tougher like that.
I would probably curl twice a week with a heavy focus on EZ Bar Curls (work up to low reps and then maybe do a high rep back down set), DB Curls, DB Hammer Curls, Reverse Curls. Heavy palms up back stuff like chin-ups, 45 degree bent over rows, etc, can help you out as well. The buckeye routine is high volume and pretty good.
NASA and 100% RAW are the big feds that do curl competitions regularly, there are usually a lot in VA near UVA every year. Good luck with your meet.