We have an electro technical store (light bulbs, electrical cords/cables, wall switches/sockets/etc, parts to make and/or repair light fixtures, etc) so we haven't really got much touristy stuff. Except the converter plugs, but since I expect most foreign Tour-ists
to be from Belgium and France they won't need those.
On Saturday morning we have our bi-weekly consulting hour. Sometimes people come with big and/or heavy light fixtures for my father to diagnose. They often come by car, park nearby to unload the light fixture and then go park the car in somewhere. That won't be possible that weekend.
I just read that a lot of people in the Tour-zones haven't gotten the letter (yet) and are unpleasantly surprised. Those are the ones that follow local news, those that don't will have a problem. The council has stated that it maybe will extend the period you can request the vignette.
I'm still really looking forward to the weekend. Though I probably won't be finding a spot along side the route. We've heard that cycle fanatics from both the Netherlands and other countries have visited Utrecht to find the place they want to stand along the route.