Parked a few times in the past but such a pain in the arse getting out. I have an 80 mile drive home so don't bother any more, rather pay the parking fee and be on my way, than queue for 45 minutes to get out.
The only time I ever parked in C was I think for the homecoming against Gillingham, and it took an hour to get to the traffic lights at the end of the car park. Never again!
I usually park off Longford Road and walk up the canal and over the railway footbridge.
I might be wrong but the cameras look to be placed on the slip road as you head down to the island at the Arena Park, so surely people at Burger King Pizza Hut etc. could in theory be hit with this charge! I used the Tesco car park most of last season but I'm not chancing it, I had a bit of a ding dong with a company called Parking Eye which operates at the Walk-in Centre in Hillfields. I did have the charge dropped but that was with a lot of emails back and forward.
If you do a search for Parking Eye there's been a some high profile cases of people challenging them through the courts. At the end of the day you just want to park up, relax and not worry about these clowns coming after you!