Hi Di66 - I'm right there with you and the dry mouth challenge. It's quite annoying. The thing that helps me most, other then always having a water bottle or two with me, is trident gum with xylitol, I like tropical twist. I've actually figured out that I can get away with only a half of that little stick. At night I take a half, and stick it under my tongue, or between my bottom teeth and cheek. If I do that I can go all night without a sip of water. I actually hate gum, so go figure. Also I have tried Xylimelts at bedtime, they too were very helpful. It was given to me as a sample so I'm not sure about the cost. The package says you can get them at the rite aid drug store, I'm not sure if you have rite aids where you live.
Hope that helps. And hope we both get more saliva as time goes on!