I can understand being guarded. I know you probably already did this, but because the weekend was so unusual, did you take a second to tell him thanks for a nice weekend? I try to do that. It's a little appreciation...and also acknowledgement that it's hard work for them too, to crawl out of their shell and be nice, and sometimes I think they look for appreciation more than we think they do.
I'm sure tonight will be fine. Nice of you set an account for him. Keep up the beat, the flow and comfort of the weekend. Don't be nervous (easier said than done).