I have wintered my boat in wet storage in LIS aside from 3 winters in the Caribbean
and a couple of haul outs since 1985. No problem. Boats are meant to be supported by their hull
with the keel
pulling down. On the hard
the loads, ie weight of the boat is resisted by the keel
and steadied by 7 or 8 jack stands. This is not advisable, but probably not harmful. Your hull can dry out a bit, if it takes on water. And that could be a consideration. But if you have a good gelcoat
or a barrier coat than this is unnecessary.
You'll want to unstep the mast
if stored on the hard
. This is an additional expense with some benefits and hazards. Damage in handling is one of hazards, while protection, inspection
are the benefits. It costs a lot more too. And you have to re rig everything and de rig everything.
So in water is much cheaper and you get to use the boat more. Some raise the issue of ice. This is rarely a problem, though, most have bubble systems to defeat ice. Your hull is more likely to be lifted than crushed by ice at the dock
My opinion: go wet. save your money