congrats ! I remember taking child 3 to college when I got home it was so quiet - motionless - just kinda weird at first. Believe you me it changes quickly. That was 8 years ago and now everyone has graduated - one masters and all married and a two year old grandson and a grandaughter due in Dec. It is now again busy busy; but a different busy. I always say a new chapter.
I hope your DH gets to join you soon; to start that new chapter.