Try the "Campervans & Motor Homes" section of the Yellow Pages:

http://www.yellowpages.com.au/search/listings?clue=campervans+%26+motor+homes--hire&locationClue=Newcastle
http://www.yellowpages.com.au/search/listings?clue=campervans+%26+motor+homes--hire&locationClue=Maitland
http://www.yellowpages.com.au/search/listings?clue=campervans+%26+motor+homes--hire&locationClue=Cessnock

You could also use Google's advanced search filters:
https://www.google.com.au/search?q=motorhome+hire+OR+rental+OR+rent+newcastle+OR+Cessnock+OR+Maitland

Hi all

Is anyone aware of a company that hires motorhomes for 3 / 4 day weekends please, in the Newcastle, Cessnock, Maitland areas.

Try this Google search  https://www.google.com.au/#q=motorhome+hire+Newcastle

Cheers

David

Thanks all I have tried some of the links and have passed some names on to the person asking.