There were rules that Sam and Castiel had put in place when it came to being on the road. When they were together, there was sex but no scening until after the case had been finished. They needed to be able to move and move quickly, if necessary.

During the times when Sam and Dean went out to hunt and Castiel was left at the Bunker with Kevin as research backup, they talked each night but rarely more than general conversation and a couple of 'I love you's toward the end of the phone call.

But once the hunt was done, Sam made certain to pay for an extra room. That way, Dean could celebrate his way and Sam could celebrate his. He stretched out on the bed, punching in the number for Castiel's cell phone and settled back, humming to himself as he waited for his lover to pick up on his end.