Y'know, I never thought about this. I don't even know if I have a specific set pattern. I know when I get there, the dogs are the last things out of the truck. They go directly into the crate until I get fully settled in. Hubby is with me in class and at trials, so that's why I don't really have a set schedule. i.e. I don't get the dog out 5 dogs out, etc. Also, because of his height, except for AKC JWW, we're usually within the first 10 dogs. So as I walk, hubby takes Koji out for a potty break. I go back to get him and get treats. I will warm him up, walk him around, get him to focus on me with treats.
This is the only consistent thing I do. As I get about 3 dogs before us. I put Koji between my legs. I'll stop feeding him by this time (depending on if 1. I have food or 2. he's being crazy). When I'm on deck, I usually turn my back to the ring, with Koji between my legs facing away from the ring.
When I go in, I USED to throw the leash as close to the leash runner as possible, but since his start line stays are broken and my tossing the leash distracts him from me, I don't do it anymore. I'll just drop it next to Koji, keep him focused on me as I lead out. And off he goes, without me. Still working on that stay. lol.
After his run, if he did great, I treat him and he stays out with me for awhile. (My friends dogs learned after a run, treat or not, they go into the crate and dislike it VERY much. So, I didn't want Koji to associate "end of run" with "stuck in crate".) If he did bad, immediately in the crate no treats. And by bad, I mean so bad, I had to walk off. For the most part, I let Koji stay out of his crate. It just depends on how much he's acting up. If Miko's there with us, they both stay out.
In class, he's not in a crate since hubby is there. I will hold his leash until I have to walk. I always handle the leash so Koji knows he's there with me, not hubby (it used to be an issue, I doubt it is anymore, but it's habit not). Hubby will hold while I walk. However, in the last class I took (new instructor), I had Koji in a sit/stay and she started talking to me. I didn't like him being in a sit/stay as I was listening to her, so I went back to treat him for staying. I was afraid he'd break while I was off somewhere else and since I'm working on it, ugh, I had to treat and listen. lol. BTW, Koji didn't break.

Otherwise, my old instructor used to let them wander so they weren't "working" while we were ignoring them.
For me, crating and stuff is dependent on how much Koji is barking at other dogs, or not. If he's not, he stays out. If he is, in he goes.