Find out who delivers cars for your local car dealers. Then find out who out of them regularly travels up near where you want the cars picked up from.
Most will deliver any vehicle anywhere if you have enough money. Most of them don't want to muck around with wrecks that can't be driven on to their truck.
:-/
A cheap paddock wreck can quickly become expensive if you have to pay a couple of hundred to transport it anywhere, even your own fuel/time going to get it yourself can outweigh the value of the parts on the wreck. Having said that, it is a lot of fun!