Oh wow i honestly didn't know that, should i then just throw orange slices and sweet potatoes for hydration? Also just to clarify, i have my crickets in there own cage, i dont have the crystals in the cham cage. You saying when it dries up it will re swell back up? I honestly thought it was a once its puffed up its done. I got them here:
http://tikitikireptiles.com/products.php?id=48
Yes they puff back up and re hydrate.
Well that depends on the temperature of where I live. I live in Kansas. It doesn't get too hot and my place will stay within a reasonable temp from 50-75 degree most times of the year except for winter. As long as the ambient temp of the terrarium can be maintained with a decent heat lamp, I don't see any issue with the ambient temp of my house affecting the cage temps too drastically if the AC or heater went out. If power all together went out, then yes, that would be an issue, but power outages are fixed relatively quickly, so this begs the question of whether or not the timers reset during an outage? If they don't reset, then the power will go back on as normal and the timing schedule shouldn't be affected. I understand your concern for temp outages, and equipment failure, but how likely will a Mistking fail if RO or distilled water is always used in it? Again, a hard question to answer.
Need timers with battery's as said. About the Mist King, they are fairly hardy sure but anything can fail for any reason.
Its really up to you, how much trust you want to put into it, I wouldn't put much. I come to that as someone who sells similar pumps, I would not put much trust in it. If It were me, I would be 100% sure that everything has a backup.
If you have to leave all the time, I would put the chameleon setup on a high KWH UPS, and go with redundant MK pumps (in parallel, this will double the PSI, but that should be okay ask MK to be sure or get a PSI reducer), and nothing less than a Spyder Robotics Herp Stat 1 (not basic it doesn't have a relay). That way you are ready for failure and can deal with it. That may be a little extreme but as much as you are gone I would suggest nothing less personally.
A Portable A/C / Heater with a digital Stat would also be helpful. Just to ensure the temps stay in line. You could set it higher or lower than the main and only use it in the chameleons room.
A webcam and or one of those reptile guardians would also come in handy. To remotely check up.
As to kansas weather. You would be surprised. Here is the thing especially with places that get cold. Your house was built to keep heat in, it will also do that in the summer. If it gets to 80 outside my house and the cooler is off it can get 100+ inside easily, as my house is built to handle the cold winters where I live.
Now add the heat from the lights (even if the herpstat shuts the basking off) you could get alot higher temps in there than you think.