"If a squall comes through with winds of 30-60 knots, how do you hold that boat down? It is going to go flying away like milkweed seeds on the wind."

How heavy a boat do you need to be "safe"?

History of all development classes seems to show that initial problems of surviving in strong winds are overcome by improved boat-handling technique. E.g. the 49ers have moved their max-wind limits quite a bit since their debut.

As an amateur, I am more worried about breakage than being carried away (if you excuse the pun).