I maintained a high bb/100 through straight, no nonsense camping strategy at 200NL. I think one of the keys to sucess is getting value out of your hands. You have to take your reads and run with them hard. If you think the guy has TPGK and you have TPTK, you should be able to punish him with 1/3 - 1/2 pot bets on every street. Similarily with TPTK vs over pairs. Raise thinking opponents out of flops where you think they missed. Also I found that big c/raises with flopped sets increased my winrate a TON. Start raising mid SCs from LP against campers, and own them when they flop a set and put you on an overpair when you acutally have a mid straight or a flush. Also, raising SCs sets up some very profitable semi-bluffing situations. I love hitting a OESD or flush draw with SCs and putting in a standard c/bet. Finally, exercising a little pot control in raised pots against probable set hunters decreases their implied odds drasticly.

EDIT: plus, not everyone at 200NL+ is camping out. There are still plenty of fish ready to dump a full stack with AA or TPTK.