Marg, I am surprised that none of the other CH guys responded first.
We use a Cannon 2040 laser printer and keep a can of contact cleaner handy for the rollers with the lap scoring gear. This printer keeps the paper under control in a closed tray till it exits after printing and has minimal dirt intake for off road.
The SMA guys have the good idea of trading it off regularly, but we haven't even gone through our first toner cartridge yet (over 12 months).

Peter