I am looking to rent between 10 & 20 outdoor navigation GPS units for a 5 day period in December. (For example the Garmin Dakota 20).
Does anyone know of any groups or companies able to rent outdoor units? A key point is that the units need to be of the same model if possible, must have electronic compass built-in, and preferably be touch-screen.
I´m guessing there is a reason you want a touch screen?
Maybe also talk to Garmin, they must have demo units - or at least know who would hire stock of them? GPS units for hire are few and far between at least in the tramping world, PLB´s are the main item of kit usually for hire, along with mountain radios in my experience