I hate checking here as a lot of hands will pay you now where they mightn't on an 8+ or non-pairing river. I think it's a bad gamble to rely on the preflop raiser betting in this spot. However potting is way too obvious and will fold out any non-idiot.

I think a 1/2 pot bet has merit. It looks a bit like a low draw feeler bet (maybe with some sort of hi). You'll probably get two calls if they have low hands and you can charge on the river if a low hits.