I'm not a Guru, but I'm using those Heartfelt beads to keep everything at 65%. In the past I have used the regular humidifiers that come with the Humis but those suck, and some other form of beads that my local B&M carry. These work the best.
For Temp & Hyg I recently started using one of those Radio Shack Wireless units. Its just incredible how easy it is to use and how many features it has. I put the basestation on the wall in my office and a remote unit in each of my Humis and I can track everything from the one spot. No need to open each of the boxes to peak.
Mike