KS, some people who do CCPD who are high transporters did more frequent exchanges, but dwelled for less time. For instance, I believe Susie did six exchanges through the night, and her dwells were around an hour and a half each. I'm a mid-transporter, though, and did four exchanges with two hour dwells. You might ask your nurse if you could do more frequent exchanges, and what the effects would be. Like you said, doing more frequent exchanges, you might be at risk of dehydration, but then you'd just have to drink more, and since when is that a bad thing?
I'd be really interested to know what your nurse has to say about this, so please let us know!