Personally I don't think anyone doubts good quality campaigns can be made outside of HLP and VW, though HLP's Forums is what has made it so prominent, after the collaspe of the VBB most people either went to VW or HLP which at the time HLP sounded like a good place... "bringing modders together" or something on those lines, VW was primarly focused on games pertaining to V's work, eg Freespace, Red Faction and Summoner Game Series so it wasn't like dedicated. Currently the only thing I believe is keeping VW alive is BWO and TBP, other than that or once those are complete VW will be less populated or visited.
Although I think HLP is good in so many ways I do believe that there should be a central place for forums for the Freespace2 Community that is not soley run by one group. This should have been done some time ago. Currently there are too many forums to check into, people might think 3 is not much but I tend to think 3 is a big number especially when u regular visit other forums on other topics. So I think if there were one primary freespace forum for all campaigns people would tend to visit all 3 sites (HLP, VW, SG) more often.
As for SG becoming more popular 'TheShivan' has got one point straight, get more content. This I would imagine is the only reason HLP is so frequently visited because new content is coming from members in the forum, and the SCP project is something everyone choses to look constantly forward to, and last but most of all the community exists there the most.
You probably all know this stuff already, but I have some suggestions that might be a good idea. Talk with VW about the Campaign Watch Archives, after checking its non-existence perhaps one of the many staff there may still have a backup of files that were once there. Some one really needs to put up a Campaign/Mission Archive, because several missions are getting lost forever, some maybe good, others might not be but the community is going to need one sooner or later.
I think this response is in reply to what you've asked, I'm still doubting it myself, if I come up with anymore I'll inform you. Well of course I have some ideas now but there not in scope.
