Well you asked why people don't attend - in my case I have been to 3 since Feb 12, the first just after I bought my crossfire - a few of the other owners seemed to take delight in pointing out all the faults with it

, another was Heritage - fine not really a get together just a wander around centre.
The other was MB World and Brooklands - after arriving went in out of the rain to have a look around as first time there from top floor noticed a stream of crossfires headed away.
Newbies don't know the ropes and meet locations are often new so a little more advance info on agenda would be useful either here or on crossfire UK site as long as we know which.
Besides that mostly they conflict with other arrangements.