I'm in love with the idea of a coffee/tea bar at the wedding. A delicious smelling little warm drink station with tiny sweets to fight back against the chill as evening comes- because a cozy warm drink will help you keep dancing!
Lawn games like croquet, bocce ball, beanbag toss and horseshoes are simple to set up and easy for kids and adults to play during cocktail hour and after dinner. Not a bad idea when there's a gap between wedding & reception. This might be kinda fun.