I do think it's a bit naughty to charge per person. It's an education seeing how differently shows are run, I could have taken a coach party into Driffield free of charge.
Thinking ahead - does Crufts charge per person? is it worth changing my dogs into both name ownership for the future? Don't forget you are talking the NEC for LKA -hugely expensive to hire and I am not aware of any shows there where there is no fee to get in -I'd imagine it is up to the NEC that and not the organising society.
Crufts is NEC as well, it's something like £14 or £16 per person to get in. For the sake of getting an extra ticket, and also an extra bench to fit another chair in front of!, I tend to enter an extra dog rather than pay for another ticket. It works out much the same -bit more expensive but you get the perks LOL. And I joined daughter up for YKC so she gets free passes for all four days anyway. :)
But yes, you could change to joint ownership. Remember though if you breed and have a kennel name that will then also have to be in joint names.