Regarding the safety of Bass Strait crossings, I have done a return trip in my (LAME maintained) Eurofox. In my view it is just another form of "Tiger Country" In my case, I did the recommended track over Flinders Island (via Cliffy Island, Hogan Island, Deal Island then via Cape Portland or Waterhouse Island). Many of these islands are very rocky looking from above, and seem not viable for a good landing should the Rotax 912 fail.
Of course I did the recommended SKED reports at 15 minute intervals, at flew at high altitude (8500 & 9500) for best glide range - so only travelling in ideal weather helps here. Also mandatory was my life jacket & floating PLB, personal strobe, and for extra help, my SPOT locator, OzRunways tracking, and ADSB-out. With all of this, I still considered it a calculated risk and flew solo, not feeling I could put someone else at the same risk in my Eurofox.
I'm happy to report that my journey went just as I (carefully) planned, and was without incident. Being RA-Aus, I have no access to Class D at Launceston, so I had to track along the north coast to Devonport to re-fuel, making my journey much longer for no good reason. The regulations as they currently stand are very discriminatory towards RA-Aus pilots, forcing us low under CTA steps in rough tiger country, or preventing me having Class D access at Launceston when that would be shorter & safer for Bass Straight crossings.
I wish CASA would do as their name implies, and put RA-Aus pilot's safety ahead of their bureaucratic intransigence on CTA access/transit, but that rant never seems to get old for me...