Nothing similar?

It reminds me of Sprinsteel (http://www.myfonts.com/fonts/paragraph/springsteel/) but obviously the effect is completely different.
Another one could be Hobo (http://www.myfonts.com/fonts/atf/hobo/alternate_cuts.html), but, well…

On the rough side: http://www.myfonts.com/fonts/wilton/saycheez/ (or, not rounded, http://www.myfonts.com/fonts/jelloween/jesterday/)

Same basic idea, pushed a bit further…

http://www.myfonts.com/fonts/nicksfonts/nellie-kay-nf/regular/glyphs.html

Thanks guys... not quite sure any of those will look like a campground sign (maybe saycheez). Hobo was the closest thing I had found on my own.

For a different style, you could look at the suggestions in this older thread:
http://www.typophile.com/node/77683

I contacted the nice folks at Wood Product Signs because they had this photo posted of a newer sign they made with that older type:

None of these are exact matches, but have have a similar retro feel (to me):
- Zar Brush Gothic
- Dash Decent
- Wigwag
- Magnesium
- Delargo Rounded

Search terms like "monoline," "rounded," "speedball," "showcard," retro may get you closer...

That Dash Decent looks like a good candidate. Thanks to all for the suggestions!