Free: Contests & Raffles.
I would save the duck hunting for another day. It just sounds like you'd be setting yourself up for an accident, with all that driving, possibly a lack of sleep, probably heavy traffic going over the pass at the same time you are, and being short on time possibly causing you to drive faster than you would otherwise.
There will come a time in your life when all you will be able to do, is have fun memories of Grandma. Family first. I didn't, and I so regret it now. Go, tell her you love her, and make her day. The ducks can wait.