Just come back from 5 days camped at Stringybark camp ground, hot showers, flushing toilets 16 large shady sites. $15pn
Three other camp grounds within the park, at $5pn,drop loo's only ;
Tapanappa
Trig
Cobbler Hill

There is also a once only (if camping) $8 park entry fee.

http://www.environment.sa.gov.au/parks/sanpr/deepcreek/visit.html