I know this is an old thread, but I have to comment.
I'm an NRA trained marker and recently I started private marking. When shooters complain about the quality of the NRA markers, I have to say we're not all the same! There's a fair few of us that aren't stroppy disinterested teenagers. Unfortunately we are a minority. Many of the mature ones won't work weekends with the kids.
I worked the Imperial this year. The kids were a nightmare. Often staff were reduced to searching tents on the markers camp site when they didn't turnup.
It's like this. You pay for a service. If you aren't happy complain.
You can book a private marker, of which I am one. Charges are slightly higher but you know what you are getting.
Any questions?