I see this quite simply, insisting on you camping is an ALR so its not allowed.
Holding an event on a campsite that does not allow day visitors is not an ALR.
To get the smiley all you need to do is attend the event on the day and at the time stated on the event page, if you can get there. It is then about the ability to get there for said date and time rather than having to camp.
Question why is it so important to force people to "camp" what if my house backed onto the campsite ? or i lived on the house over the road from the entrance ?
"If you can't be a good example, then you'll just have to serve as a horrible warning."