I've done a camp/hike theme for four years. If you go to the
back to school and
room tour pages, you can see pictures of things. I have some downloads too. But, beware...we are changing webhosts soon and the site might be down for 24-48 hours in the near future.
http://www.smithsroom.com
Also, this site has a camping set that I bought that can be used for making all sorts of worksheets, decorations, etc.
http://countryclipart.com