I am not ever going to attend one but a couple of questions come to mind. For prone and a sling are they permitting an ISSF style single sling and if so does it have to remain attached to the rifle or can it be unclipped as normal? If you have the time and experience a prone + sling is pretty much bench rest stable (not easy to switch to incline/decline quickly though).
Less seriously - are there any of these vapour ciggie substitutes with very low to 0% nasty in them? if so everyone could look 'cool' like the shooters behind the bike sheds and puff out those huge clouds of "smoke".
BFTA Secretary 2012-2014
CSFTA Secretary 2014-2016