In the 25 years I have been doing this, I have seen shows change out of all recognition. Not only in number but size and focus. There is no doubt that people expect more from a show these days but there is room for all types.
I too enjoy a 'private' type event where you can chill out and chat to like minded(!) friends and indeed it would not bother me if the public were never there! The trouble with that sort of event is, as Clive pointed out, there is no income unless it attracts some funding from an external source.
I also like the chance to drive my vehicles properly, it is after all a vehicle hobby and that is why I restore them, to use. However, I probably only take a vehicle to a couple of events a year now, so saving up for a good blast is easier to swallow.
I remember Beltring as a nice, small show but with an excellent variety of vehicles, a great site and none of the rules that seemed to infest other shows at the time. I know it still has these 'values' but for me, it is too big now. Just my opinion.
I prefer to do different types of show now, more low key and if it involves a road run or indeed a large enough off road area then all the better.
But... as I'm in no position to organise one myself, I'm happy to go along with what is being offered and choose which ones I attend.