My dad is to the point this year where he can't walk the 400 yards to the hunting tower that we usually hunt out of. I'm heading out this weekend to setup a ground blind on top of a hill where we've had success in previous years and is a much shorter walk for him. Do you guys leave the windows a crack open so that the wind can blow through the blind and possibly prevent it from blowing over or do you just zip it up tight and anchor it good?