Well, you could just put litter trays down wherever her favourite places are, ie. she likes sleeping on the bed so put one there, but that's going a bit over the top and there's no guarantee that she'd use them anyway.
OK, first of all, I have no idea whether she's actually suffering or not. You, your dh, your vet, will have to answer that one, either separately or in some combination.
So, you are doing what you can to contain the problem of uncontrolled wee, which is to shut her in a particular part of the house, unless there is someone around to keep an eye on her. How restricted is she, in comparison to how restricted she was? I know she's comfortable in her room, and warm, so you don't need to worry about that; and people being in or out is no different from always and won't change either. So, the main difference her incontinence (for want of a better word) makes is that she's confined to somewhere where she's warm and comfortable and is used to being in, only the door is shut and she can't get at the rest of hte house until one of you is home.
This is where you have to become as objective as you can. Do you think imposing this restriction on her has a seriously devaluing effect on her overall quality of life? If so, how much in the last year, say, do you think the quality of her life has been reduced, and do you think that this latest effect has brought it down below the line where the positives outweigh the negatives?
I'm sorry FABwoman, I can't really say more than that. You know that I can't make the decision for you, and you know that I have no idea without seeing and knowing FABcat myself.
It is such a hard thing. I do feel for you. 