Dee Dee,
I had no idea how much showing experience you had. This entire field is a good match for both your creative skills and your avocation.
BTW, we have a Rottie that we bred who was #5 in Obedience and #3 in Agility last year despite the fact that she had a litter of pups in April. She's working on her OTCH/MACH. How do people find the time to do all that training?!!!
You have 4 months to get yourself ready for the National. Practice everything and get to know your camera. With your eye, you'll do great.
You might even talk to people at the Lure Course Trial you're going to this month and ask them what they like about the photos they're currently getting and what they'd like to see. Some primary market research

It might give you some ideas for what to deliver at the National to maximize your revenue potential.
Jim