Brent,
You need to be a member of Elks to use their RV campgrounds. Membership is very reasonable, approx. $100 per year.
RV campgrounds range from $10.00 to $25.00 per night. Many do not have sewer at site but have a dump station on the premises.
Check out Elks web page, there is a link with a list of RV parks by state, and facilities available.