Before I comment on some of the previous posts, an update on Edan...
I took him to the vet today. He found that he's still a little sensitive in the lower back. I was told to let him rest, no jumping or running for two weeks, and give him 82mg coated aspirin if necessary. IF I don't see improvement or things get worse - limping, not wanting to do stairs, etc. - to call and he'll refer me to the local PT/Rehab clinic for treatment.
That's a shame that a soft tissue injury had to show up at nationals of all places

I'm glad to hear though that you figured out what was going on.
Did you see Debbie Basham and her sheltie Kovu by chance? He just finished his MACH3 in AKC, and was dropped down to preferred as he's 12 years old. His owner is working on finishing his C-ATCH, and took him to nationals. He was pretty fast in his prime, and still isn't bad for his age. He's Athena and Ember's sire

and Aurora, Lark, Breeze, and Roxas' grandsire.
Doesn't it figure the first time Edan goes to Nationals he also gets his first injury. It always happens at the most inopportune moment.

He's doing better which is what's important though. I'm glad I spent time and money on the treatments available to me.
I didn't get to see Debbie or Kovu. I pulled up the groupings and they were in my rotation but a completely different group - which put them always in a different ring than me.
I did get to meet and talk to Nick Sparks briefly. He runs a Sheltie named Fiona and they star in "The Agility Show" on cable. I bumped into him the last day of the trial in the score/ribbon room. Unfortunately I didn't get to meet Fiona since dogs weren't allowed in that room.
So what is so good about going to nationals? Is it worth an extra effort? What did you find different? What did you like and did not like?
Honestly, it was just a super-sized trial.

Other than the size and the larger ribbons there wasn't much different. The first day there it felt different because the wing jumps actually had the CPE logo on them (see the attached picture -sorry it's grainy, the camera on my phone stinks).
It was exceptionally well run. We had over 1200 runs per day (the average show caps at 375 per day) in 6 different rings. Friday and Saturday we started by 8 AM and were finished by 5:30. Sunday we finished by 2:00.
The only thing I really didn't like was we had to be there by 6:30 every day for check in and general briefing at 7-ish depending on how check in was going. (Check in was to get your course maps for the day.) I'm not an early bird so
It was well worth the experience and I'd definitely do it again.