Yes, that's one of the wonderful things about our touring rig. Set the brake, lean it against a wall, and life is good. I like to find a lunch spot with an outdoor terrace now. That's common in the Czech and Bundesrepublik. Ran across one in Canada on our last tour. Feels great to eat and drink with your bike right there. I know you can rubber band your levers, too, but the drag is really cool. I'll use it at long lights too, when it's not flat.

I think the right disc would work fine if used as a drag. Just have to keep an eye on it. No need to make the drag do all the work by a long shot. It's just to keep the speed down to where wind resistance and the rims can handle it without worrying about blowing a tire off.