I have set it up before. It is a little weird since there's no account number or any settings really. They do all of the provisioning on their end using the domain name of the site, so it does just work by adding it to your site/page. The load rules would be based on domain in most cases where you want to capture every page on the site. You would just want the tag firing on domains that are provisioned by SessionCam.
As far as data mapping goes, we mapped a few data elements that we wanted to capture as custom mappings. I can't remember if they had to provision those as well on their end.
Long story short, most of the setup is done by your SessionCam advisor or admin and very little is done in Tealium.