+1
I'd either take a light weight solution or just figure that I can limp along or hitch a ride to the next bike shop. A single broken spoke can be pretty easily ridden on and breaking multiples isn't that frequent of an occurrence. The Unior tool weighs something like a half ounce so I usually take it and a couple spokes along, but I'd rely on limping or hitching to the next bike shop before I'd carry much more in the way of tools. A vise or a crescent are heavy and can be borrowed in most towns and when I or one of my companions has needed a lift for injury or mechanical breakdown we have never needed to stick out our thumbs more than 15-20 minutes. On more remote roads especially in the desert there are way fewer cars, but most of them will stop to help.