George,
That sounds like an interesting idea. How would you set it up? Would each person have to pay some sort of fee to be included? How long would the hikes be? How many days? How much gear would have available?
Would you just have a bunch of different pieces of gear or would you try to cater your list to the people that have signed up for the hike? Would you expect the people to buy items from you or from the manufacturer? If from the manufacturer, would you try and develop partnerships or would you make your money from people signing up to try the gear?
It sounds like an interesting idea and I for one could see myself going. Not only for the chance to see a bunch of gear in action, but also to learn from experienced people (some of the members may have extensive experience with a product that I have never used) on how to use items most effectively. I suppose it would be best to have the perfect amount of gear for the group size and just split it up among everyone. That way even if someone didn't particularly care to try something, they may find something they like, or perhaps something they know they hate.. You could change set ups each day so that everyone gets to try different things. Everyone could still see certain stoves in action, even if they aren't the ones using it.
Anyways, it sounds like a neat idea that would be both a fun way to see new gear and a nice way to meet people.