We potty in the bed, using a potty that I have at the foo of the bed. I hold it between my legs on the bed and he pees. I usually try to cover the cold plastic with a prefold or something, so it isn't cold for him.
Sometimes before laying down to bed he pees, but he doesn't always want/need to. So, he usually just nurses to sleep, and later will wake up, nurses again, and then pees (well, he had been...now it feels so random)