Hey Nina-
We have been letting Jack sleep with us since we started the great move to the other side of the city, too. He hadn't had a problem. While DH was here, I would go to bed, and Jack would hang out with him on the couch until DH came to bed, and then sleep all the way through the night.
DH just left for work (gone for a week) and now I am having a really hard time getting Jack to go to sleep. He is doing the same kinds of things you described, up, wandering around, whining, etc. It takes him a good two hours to finally settle down and go to sleep. Drives me crazy, cause all I want to do is go to sleep.
So, I don't have any advice, but I can commiserate on the lack of sleep.