I think perhaps the difference between this and DBing per se is this is less aggressively honest about how I feel. I mean, I know DBing says, hey, it's not about how you feel right now, but when things get down and dirty, you speak the truth, calmly and unemotionally, and let the S deal with their own reaction.
Not sure there. Anyone?
I don't know if you've had a chance to look over the Homer stuff, there's a part about the harm "honesty" can do to your relationship. I tend to agree with him, in that honesty is sometimes unnecessary & creates problems unnecessarily.
This kinda goes along with what the DB coach told you about not having to agree (I think it's a mistake to disagree, although there are ways to validate & not really agree, if it's important to you). In my mind, your H already knows what you think & is focused on fighting you until you agree. If you continue along that path, it'll be more of the same. Taking the different attitude as expressed in your e-mail will have a different effect & put the responsibility in his hands.
Have a great time at camp this weekend. The less said the easier & better, IMO. This is where you "fake it til you make it" comes in. After a while, it'll become second nature (we hope, always difficult to put theory into action at first). I stumbled around a bit last night, although, all-in-all, I held my focus.