So, an update.
I actually slept last night - not by choice admittedly. I've been up but for 12 hours in the last 4 days as a result of the A) struggling heating element kicking out beeps all the dang time before I realized that it wasn't because of my A/C, B) stress, C) vigilance in making sure the temperature was correct with the new non-digital thermostat (a pain, let me tell you!), D) watching for potential hatching issues (I had more than a few die in the shells before they could break out and the humidity level was good), and finally E) whatever was going on with the chicks.
At this point, I'm not convinced that it was dehydration itself, but rather secondary to what might have actually been eye goop. I had a few quail this morning still not bright eyed or no eyes open at all. I took them all to the bathroom where one had a little hard line and I was all 'hmmmmmm!'. A little warm water and some coaxing and that came off and the chick's eye opened. Okay, so...maybe some microbiology involved. At this point, with all the other issues, I'm not surprised. I did make them all drink some slightly concentrated electrolyte water, just to give them a boost, and put them back in the brooder box.
As a result of my crashing out for 6 hours (included in the 12 listed for the last 4 days), I woke to one dead chick. I'm positive that being awake sooner or staying up a little later to make it drink more would have made a difference, but...this is life.
I did have another chick hatch this morning. It's day 20! I have another in the shell pipping. It's not sounding as strong as the other, so I'm keeping a very close eye on it.
Meanwhile, I did move everyone back to the brooder box and made a little tent around the light to keep the heat in. It doesn't get too warm, but they can stay warm enough and it's easy to get out of for water. The food is sprinkled everywhere for convenience, grip, etc.
MAN I have a headache. I need more sleep, but I don't want to risk more chicks. What's a gal to do?