It's not crazy. When my husbands dog, Bozley, passed away I had never had to "deal with death" up to that point. I was the one being weird about having the cremains and was ooged out by having him put the box on the mantle. But, as the years have passed and I have my own "heart dog" I think about "the box" a lot. I too wonder what I will do when I have mine. I don't want a collection of boxes but want to do something to honor them.
It's funny because now it is me that my husband and kids tease about the box on the mantle. You see, every so often when I am cleaning and dusting it off I find myself talking to Bozley and telling him what has happened in our life since the last time I dusted
(((Hugs))) to you, Ms Darla will be happy what ever you choose to do.