Trust me--I've been there
Just do your best not to get nervous...it really travels donw the lead to your dog. Remember your job is to make your dog look good--its hard to do that when you are trembeling lol.
When was your last show? How old is your boy?
Have you done any B matches? There are usually a few offered--I believe one before Vallejo, one in Woodland and the YTCNC puts on a funmatch in July if I remember correctly. Those are usually the best to get the knack of things so you can feel confident in the ring.