Doc.......
1......Firstly, Get a second engine for your Cub [and make it a Turbine whilst your at it].
2......Yes the Switlik is a good option..........and have your local boot maker sew the HEEDS/Spare Air holster onto the inside edge of the Jacket so the HEEDS is always attached [good advice Nigel......if its not on you when things go wrong, it won't be with you in the water].
3.....In your Switlik Pockets:
Heligraph
VHF/UHF Epirb
Day/Night Flare
Knife
Pocket Rocket Flares
Pressure dressing
4.......406 EPIRB [as well as the small epirb in your Switlik]......this will Tx on 406, 121.5 and 243 mhz.....and give a triangulation of your position....also it should be registered with your local SAR folk, and your aircraft Registration can be encypted in the Sat Signal........so we know who you are and where you are. [Use Google and "406 Epirb"...lots of good www sites for info]
5......Yes a high quality Heliraft [as apart from a marine raft]....reversable and better quality.
6......Personal suit of course....and wear it.
7......Fly as high as you can..........
8.......And of course that 15 year old Single Malt for the SAR crew when they find you.
Good luck.