The VA system seems guaranteed to cause problems, with people tagging sites for people who have yet to arrive, folks with big rigs finding that the remaining sites won't accommodate their vehicles, and groups unable to get adjacent sites.
The way to avoid all this is to make all reservations site specific. MI does that, and it works very well. When I reserve a site, I know where I will be, whether it's sun or shade, and that the site is large enough. I am able to avoid sites that are likely to be used by other campers as shortcuts to the bathroom or the beach, that are next to the playground, etc.
If they are going to take a reservation, might as well attach a site number to it.
