Not to give away too many of my Mammoth secrets, but keep in mind:
-You can dump for free at the water treatment plant in town and get fresh water. One if the best dumps I've seen.
-Hartley Springs I think is a better campground. More quiet, less dust, less riding, less people, bigger trees. We get the 40 ft diesels in there a-ok.
-Riding out of Browns is good. On of my favorite loops goes thru the Bald Mountain area, up the 1s11 thru the top to the Saw Mill Meadow area and back down thru the radio tower to Watterton Rd...which brings you back thru to Brown's. Beautiful and epic a ride as ever there is.
nice, isolated campsites exist off the 1s06 as well, heck, many places, Google and look at sat photos. Where u see an Rv, u can probably go.
-Fishing, my wife is the fisherperson, not me but has tremendous luck at Silver lake where the water comes into the lake. We ate good.
Love it there, we did 15 days ending July 2 then left for Trinity Center. (Another awesome area) Saw the races too. Enjoy
Chuck