My OH put on his charming self when we visited the Condultant and therefore his report said that he didn't seem to have any behaviour problems. Why don't the consultants take a few minutes with the carer on their own to ask questions so that they get a better understanding of how things really are. You can't chip in and say much infront of the OH?
I typed a statement "To Whom It May Concern", which I updated regularly, giving this to whichever "professional" we saw, prior to our appointment. I'd just hand it in to reception, and ask if this could be given to Dr X.
That way you can tell it as life really is, without upsetting your OH. John would refute everything I said, if I spoke in front of him, and it would lead to arguments after the visit, and this way you can avoid all that.
If someone was visiting us at home, I would ask John to help me make the coffee, give the professional a copy of the Statement, and John could be trusted to arrange a dozen biscuits on a plate, whilst I made the drinks. I'd spin this out, so that the visitor had plenty of time to read everything. Hope this helps xxx