Bob, Not sure if you will find this link helpful..... But it's a start, Solo Campers - Online Community for Solo Camping
As well as if you search through some of the Glass/Camping forums there tends to be a "solos" sub forum.
The link I provided is pretty slow forum, but hey you never know you might find a get together you wanna join in on.
I think I remember seeing a singles Good Sam group, might check that out too!
But remember, when your camping your never alone, unless you wanna be!