My next kit will look like Doug Ritter Essentials Overwater Aviator Survival Vest ™. Probably not necessary for the OP. I have all the gear in the vest including the PLB and Laser Flare, just need the vest at this point. Yes, I require flotation in a vest.

I know the OP's point in asking the question, but any off-field landing in rotary wing has the potential to go wrong. Having all your essential gear on your person is essential IMO.