There are many varied types of accommodation in the Riverland from hotels, motels, BnB’s, caravan parks, back packers, camping etc.  This site may help you find what you want: 

https://www.destinationriverland.org.au/stay 

Our base will be in Cobdogla and many people have taken advantage of the discount group booking we arranged at the Cobdogla Station Caravan Park. Unfortunately that group booking has now closed