Are there no "walkers" at your school? Can't you just park on the street and walk them in/let the go in on their own? We're not supposed to use our parking lot during drop off (you have to drive through the lot to get to the drop off area, so having cars trying to park, especially those reversers, would be nightmare.) A lot of parents just park on the street and walk their kids/let the kids walk themselves in.
I have a feeling that by next week it will have all been sorted out.