RE: What do you do...
Which direction do they come from? From what I can tell from the pic. must be from the south. I'd have to walk the creek and find the crossings. I love creek crossing's. What's it look like at the "Y" in the creek. I love big rubs and rub lines but IMHO they're a relatively low percentage place to hunt. I put them in the category of nocturnal sign.
Dan