Discover Aus for GPS

Hi All, If anyone has Discover Aus Streets & Tracks on CD-rom do you find it lacking in Camping & Caravan Sites and are we right in thinking it doesn't show Roadhouses and Fuel stops.........Or, as is quite likely, is it down to pilot/navigator error? e.g. We can't locate a camp site on the maps anywhere up the West Coast between north of Perth and Derby, although we know there are plenty. It was our hope to key in campsites and fuelstops as waypoints into the GPS for an intended 4 to 6 week journey (leaving sometime in next few weeks) to pick up our BT at start of November, from there we will continue travelling for a year or two. Looking forward to meeting some of you on the road. Linda & Den