I'm not going to throw stones or "blast you". Of course I'm the biggest pursuer on the board. The e-mail read very nice. Projected friendliness. Maybe a little accusatory about "expecting to see" over the three day weekend. Might drop that and just say sure hope we see you soon. Or ask when son (or when will "we) see you?
What do you have to lose? Throw him a bone. Send the e-mail and see how it goes. If nothing positive comes of it then try a different approach.
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt