Something else to consider would be to get in contact with the judges and ask them what their preferences are and take meticulous notes. Some prefer the binding to be super small, others have no problem with 2-inch binding. Some say custom quilting is the way to go, someone else may say that edge-to-edge is the best. Some say floating points are okay, others will frown and walk to the next quilt if they even see one single thread from your background above the point and sure as the day is long, a cut-off point will get the frown, too.
You have to keep in mind that these judges are quilters themselves, they've been in your shoes, so by contacting and talking to them, you're tapping into a major source of knowledge and wisdom. Our judges are locals that help run the fall fair we have, so I know them personally and would have no issue going up to them and striking up a conversation about quilts. I'm still incredibly nervous about entering a quilt for next year because they are extremely exacting with their judging, I've seen them pick apart a Storm at Sea that was absolutely exquisite to a normal person's eye, but there were a few tiny issues and the quilt didn't even place when they were done. She did get Best in Show in another county north of us, however.
The other option is to get in touch with a quilter that's put a quilt into that specific show. Any amount of knowledge from either the judges or other quilters will be invaluable later down the line.