Windy weather - call the game?

[Snake~eyes]

You as the official have the call here. You have authority to delay or even cancel the game if the conditions warrant it. Personally, I would never have sandbags put down to hold the goal down. In my opinion adding this makes you liable. If its not equipment mentioned in the rulebook then you shouldn't use it.
As for the weather if you felt it was hazardous then call the game, otherwise let them play. I wasn't there but I probaly wouldn't have cancelled the game because of the wind, it would have to be extreme wind, which in this case it doesn't sound like.