I'm on the fence, too... it's cool to have a campsite with our name on it... but on the other hand the only benefit that I know of to having our own site is that we have priority for it - but:
1) How often is there someone else at the site when we go there
2) Would we really kick someone else out as we're entitled to do? Or would we just find another spot (I find the latter more likely).

... so I'm sorta leaning toward keeping it - but logically it doesn't really seem to make much sense to do so.

It might be interesting to ask the question "Who would be willing to donate extra $$ to keep the campsite?". I don't know that SWXC works this way - but it at least makes the answers more meaningful - it' a good way to evaluate how strongly people feel about it... for me - it's worth maybe $10 out of my pocket to keep it.