I'm not sure how you work it out...but the one day passes dont have to be used at that stay, you just dont use that card when entering the park. I think though since they are on your room key they do 'technically' belong to that particular person. But there might be a way to get them to separate it from your room key. I asked last year if I could give my brother my one day and was told no by one person and maybe by another we didnt go that route so I didnt look further into it. HOWEVER people have been saying you can use your one day towards your ap renewal, or upgrade them for a future trip.