Camas is a funky area. Not a ton of apartment complexes and even fewer large ones. There are a couple on NE 3rd Avenue, between Camas and Washougal. The nice thing about those is that they're across the street from the Washougal River. The drawbacks, REALLY bad parking issues. More than you'd think.
If you like living in "downtown" Camas, you can always check out the apartments above all the downtown businesses. I had some friends in college living in several. They're usually pretty cheap, but REALLY old.
For some reason, there are LOTS of duplexes and triplexes in Camas/Washougal. You might check out the local newspapers to see what is being advertised and go from there.
Camas/Washougal Post Record:
www.camaspostrecord.com
The Columbian Online Edition:
www.columbian.com
If you find something that you're interested in, feel free to PM me about the specific location and I can give you the scoop on it and the neighborhood.
Good luck!