as long as you have a hole at the fork crown, if you have mid fork eyelets or even just dropout eyelets, you can mount a rando-style rack. I made a rack for dropout eyelets and a fork crown mounted brake, but VO sells one. Most of us really don't put that much weight in a rando bag, or at least I hope not. The VO racks seem perfectly serviceable.
A rando bag is the second-best thing to happen to my randonneuring, the first being dyno lights.