The campsite is at the dead end of co 500, which MR lives on. There is a big rock formation to the right of that. I posted a google link above. I don't know if that is the campground and rock formation MR is referring to or not.
If you follow the river south down co 500 it comes out at the east side of the 5 branch area where the dogs got the hits. Mushroom lane that was referred to above is right near there.
Co Rd 500, Bayfield, CO - Google Maps
eta: co 500 doesn't follow the river all the way to the lake. But if you walked down the river bank from where MR lives, you would end up at the spot on the map.
county road 501 ends up right at 5 branch campground. beach, boat launch. etc.
thanks for the map. (you're the map!) - sorry, it's all Dora all the time tonight. (I have a 3 yo).
That campsite at the end of his road and the way it leads via trails to the creek has always bothered me. I now think the phone died at 9:30 when they reached the campground. whatever happened, happened there, and disposal happened at the lake (5 branch area? - there's a boat launch there?). now, where is the bridge and why would it be relevant in the above scenario? is it over the lake or a creek running into the lake? could MR be insinuating that DR fell into the Lake/res from the bridge?