For group workshops, I use a food dehydrator to dry coated paper (about 8x10 max). It has 4 trays and keeps a steady flow of warm air at about 110 degrees. Paper is ready in 2 or 3 minutes. And no, I don't use it to make beef jerky any more...

You can buy a much larger and prettier version of this kind of setup from Edwards Enterprises www.eepjon.com.