So, I was able to finally work out the disrespect issue I was having with Chance. : ) My instructor and I had a couple weekends of working him together. Turns out I wasnt engaging him enough, and that was an easy fix. It actually solved (most) of his looking around outside of the arena, too.
He is still a bit eh when we lunge, but he does it willingly instead of challenges me every time. He did Horse camp in May, and was a doll, except at the L, where he kept over anticipating. Riding him with all of the horses was... a task, because he kept wanting to be with them, and was over stimulated. But we worked through it.
The biggest accomplishment for him was getting to do the horse games for fair this year. : ) By the end of it, he was a champ! I got to ride him on the last day and it was the most awesome experience... evar!