What a bunch of wusses......ooooooo single-engine over the water.......ooooo
Seriously, yes, you do need HF.
To all the wusses......there is an entire industry made up of people flying single engine aircraft all over the world...or light twins, loaded with enough fuel, that they might as well be singles for the first couple of hours. If it isnīt your cup of tea, leave it, but just because you are a baby, donīt figure the other person is a suicide candidate.
Of course, you donīt ride motorbikes, sail away from sight of land, scuba-dive or well, much of anything "dangerous," right? Just prop up the pub bar and get fatter, certainly dumber and happier.
Have a good trip!