The weight of the load all depends on how comfortable each individual feels. And much of that comfort comes from experience and experimenting with both riding over all sorts of terrain and using in-camp equipment.
Peterpan's caution of overtightening the U-clamps is very important. In addition, wrap the fork at the location of the U-clamps with electrical insulation tape or inner tube strips (or both) to avoid scarring the paintwork on the fork.
Last edited by Rowan; 04-22-08 at 01:32 AM.