I't flippen hard to get a good ride together at anytime, not that the guys don't want to ride, it's just juggling between work, family and bikes. Now you're norrowing the field to smaller bikes, which in turn makes task even more difficult.
I also think guys don't really want to do an overnight on a small bike because of the packing required to sleep overnight. Add to that the winter season and you're going to battle to get a group bigger than5-6 guys!