Nesting Sand Cranes

It's a rainy, cool day today and the sand crane couple who have been hanging around my trailer for weeks now don't seem to have the sense to seek shelter.  I think it's mating time for them but I always thought they laid their eggs on small islands in the ponds but these two just hang around my house so I'm wondering if they're either dumb or young.  I'd be really worried if they laid their eggs out in the open because they wouldn't be safe from predators.  Right now it's a waiting game to see what these two do.