For water, I would stop at the KOA in either Cortez, or Durango (or other private campgrounds), and offer to pay them $5 if they let you fill your tank.
Not sure I see any boondocking sites near your placemark on the road. It looks like private land, all around. As 4runnerguy says, yes, it is "National Forest" indicated on GE Map, but there are lots of pockets of private ownership near the edges of many NF in Colorado. Definitely look very closely on GE, and other sources (can't think of the ones that show private ownership in the NF, but I know they exist) to be sure you are not on private land. Even the San Juan NF site may have information on private land.
Enjoy your trip!
