Charlie Moreland Campsite is a great site. Can still get there in a 2WD if needed. A good option particularly if Booloumba Cr Campsite (Just a minute down Maleny-Kenilworth Rd) is inaccesable due to flooding.

Nice spot close to all the best places in Conondale National Park.
Just make sure to book yourself in on the government website.

http://www.derm.qld.gov.au/parks/imbil/camping.html