The area is ok, if there is enough snow and the little trees are covered.
But certainly not comparable to the vastness of your Finnish lakes.
If you just want to take one kite with you, choose the 10m Foilkite.
During the week is not too much going on there so you should have enough space.
I do not know if the school is still working up there?
Try to contact: http://www.hangon-kiteboarding.com
for rantal, wind and spot Information.
"Sometimes in the morning, when it's a good surf, I go out there, and I don't feel like it's a bad world."