I have a 13 year old female Corgi who started barking at 6:00AM but now the time that she barks is getting closer to 5:00AM. She has to sleep away from us in my laundry room that I have lined with pee pads because she can not last more than 3-4 hours without having to go to the bathroom. Does anyone have a solution for the barking?
First you need to figure out why your dog is barking. This might be a variety of reasons - but given what you say about 'toilet' endurance "I want to go out" might be one.
But so might be activity outside, like the milkman, bin lorries, a cat being 'let out', sunrise, etc. You need to figure out that stimulus before you have any hope of stopping the barking.
I will suggest that lining the whole room with pee pads isn't necessarily doing a lot of good - you're teaching your dog that indoors is 'ok' to toilet. I know it's not so easy to deal with, but perhaps setting aside a sort of 'litter tray' might be a good move. (E.g. as you might with a puppy).