Gday...

Google is always a great place to begin your research and obviously advice/info from 'seasoned' travellers goes well too.

This website will give you some ideas -

http://www.bemmriver.org.au/

I haven't been into Bemm for a few years, but the road is sealed all the way.

This site will give so info on the van park -

http://www.bemmrivercaravanpark.com.au/

[Edit: Welcome to GNs - not a bad mob here with lotz of info and help, although ya gotta watch the shenanigins of Wombat, Dazren and Dougwe.  ]

Cheers - John