Lee-Bee the more I read your posts the more I wonder if we are two people sharing the same mind.

OP, I think you've received some good suggestions. I'm just going to add that if you don't already have a "screaming spot" it might be time to make one. Then when he starts to scream you can send him to the screaming spot - removes him from the situation so he's not getting attention for the screaming and it will save your ears a bit.

I used to have children that went through a phase of refusing to put on their stuff. Everytime they freaked out about it I would just cheerful remind them that "you know how to do that. you don't need my help." Once or twice the rest of us ended up sitting on the porch while he was just inside the door (I could see them the whole time and the entry way is small and gated) with their stuff. When there wasn't an audience, they would quickly put on their stuff and join us. For one particularly stubborn child, she went for a walk a couple times without her coat. I had spoken to mom about it and that was actually her suggestion.