What kind of popups? Are they Good Sam/Camping World related? If not, they are likely not from the forums.
I'm not seeing any popups on Woodalls.com forums at all. There is a Javascript file for popup.js on the forums page, but don't think its related to any ads. May be for Help popup window?
You can install the extension
Adblock Plus and see if the popups disappear. If not, you likely have some form of adaware browser hijack, and need to remove it. Either manually or through some freeware tools.