Are they requiring you to use a flat collar for CGC? I don't think you can use the easy walk harness that clips in the front but the rules do allow for body harnesses. Loki took and passed his test in a regular harness that the leash clips on the back.
We will eventually have to work with the flat collar as we progress to Rally, etc. So I thought we should see how it goes. I have been doing this on our walks:
Start off with the easy walk and walk 6 blocks over to the park.
Take off his leash at the park and attach a 20' long line and do recalls, stays, waits, fetch, and just generally run and play. By the end of this he has burned off some of his P&V.
Leave the easy walk on, but attach his leash to his collar and walk home.
He has been doing really well on this routine. So yesterday at our CGC Prep Class I decided to push the envelope a little bit and removed the easy walk entirely after we had been there long enough for him to get used to the other dogs and people. Our loose leash walking went just OK. Our turns were not as tight and crisp as I would have liked, but I thought "OK. We can build on this." Then he spotted a clump of dog fur that he thought was most the most interesting thing in the world.
Totally ignored me talking to him, ignored my sqeeking a toy in my pocket. He wanted that clump of fur! He wasn't actually pulling or tugging on the leash. Just walked to the end and was leaning into it.
So like so much of our training... two steps forward and one step back. I'm going to continue to work with leaving the harness on, but attaching the leash to his collar. I may try the 3 in 1 just to get him through the CGC.