Have a good time in St. Moritz! There are some really nice cable cars in that area where you can do some spectacular hiking up high. We also rented bikes and you could rent SUPs too.
Suggesting cable cars and SUPs to Hammer is cruel.
You are afraid of falling off a SUP into a lake? That doesn't sound like you.
It sure is gorgeous! And you must feel soooo wealthy hanging around St. Moritz. ;)
I prefer canoes and kayaks too. I can't imagine choosing a SUP for an overnight trip or a race where different watercraft are allowed. I love SUP yoga though - so much balancing!
St. Moritz definitely has a really posh side and a not-quite-so-posh side.