For a nice camping spot with no fees, may I suggest Francis Lake, just a ways up West Harrison. Camped there a couple weeks ago, got some really sweet spots, and apparently the lake has some fantastic fishing. 4WD not required, and in fact, you could probably get there in a stock-height car.
Which also leads me to a fire story: so we arrive at this spot and our buddies are already there. They've been completely unsuccessful at getting a fire going for almost an hour, so I pull out my little jerry can, pour a little flame juice on the pile of sticks, apply the lighter, and voila!
I set the can on over by the picnic table and head back to the Jeep to get some food out while buddy pokes at the fire and puts more wood on it... I guess the fire isn't doing so well now, because next thing I see the light flare up, look around, and there's dude standing over the fire with my jerry can in hand... then I see he's got the big cap closed and the vent cap off and he's squirting gas on the fire from the little hole.
Which is working fine until he decides he needs a more direct aim, so he holds the can directly over the fire, squeezes it... and now the flame has travelled up the stream and is burning off the vent hole and on the gas that's slopped down the side of the can.
Of course, dude does the first thing that comes naturally: he throws the can away. Trailing gas out the vent the entire way. Until it lands on its side near the campfire, now drizzling gas out the vent and flaring up more and more.
Campfire on the left... gas can on the right...
It was all bare ground around and pretty damp, so we just let the can burn itself out...