Sorry for the very tardy follow-up and thanks for the replies.
I do carry the bike on the packraft and so probably wouldn’t go anything above class II. We either ride directly from Melbourne or drive somewhere and then from that point cycle and pack raft. As an example, we drove to the Great Victorian Rail Trail and biked a section of that to get to Alexandra and then used the pacrrafts to go down the Goulburn River to Molesworth and then from Molesworth cycled back along the trail to the car. I’ve done some smaller cycle/packrafting trips from Melbourne as well such as on the Yarra. Another one I’m looking at is on the Ovens River using the Murray to Mountains Rail Trail. I’m also looking at one in Kangaroo Valley. The packrafts are quite stable on the back of the bike and so either MTB rides or rail trail/more sedate rides would be good. The only reason I’ve been using the rail trail network to date is because it is easy to plan around. I’d certainly be interested in any suggestions for MTB or more sedate rides in Victoria or NSW.
Appreciate the offer, at this stage I’m trying to do packrafting/biking trips as we’re training up for a longer trip in Asia.