That's a lotta tree![:-]

I've never made a bow out of maple but I'm sure it'd make a good'un. I think I'd saw that big ol' trunk into 3 1/2 - 4' long lengths and split billets out of it rather than try and split whole staves. You can even split out arrow shaft blanks if you want some good, heavy arrows! You'll probably find some limbs that'd make good staves.

But split the wood up approximately 4" X 4" boards by however long you cut them. Debark the surface splits. Dip the ends into a bucket of white glue and set the wood up under cover to dry and season for a couple of months. If I was in your shoes, I'd have my garage flat stuffed with bow and arrow wood.

I really recommend getting all three volumes of the "Traditional Bowyers Bible". Whatever you need to know about making bows from tree to finished bow, probably more than you ever wanted to know, is in those books.