a visit to this site will help :
http://freecampsites.net/attribute/states/or/
good pay camping is along the umpqua river from Glide OR to diamond lake .
right along the noisy beautiful river .
diamond lake is cold, folks .
the best dispersed camping in oregon is around big summit prairie.
hwy 26 east from prineville , road 123 east , then 42 near deep creek .
another area is the metolius metolius river just north and east of camp sherman . fs cgs and dispersed camping .
another : excellent cheap camping on the aufderheide scenic from westfir to rainbow .
klahanie , frissel crossing cg (fs) are good .
cougar reservoir is warmer than mountain lakes .
slide creek cg is noisy but french pete is good .