You might be better off squaring them up and selling or trading them. Wood turners go nuts for burls in a good quality hardwood. You can use the cut off pieces for knife scales. I know of an area where almost every black cherry tree for miles has at least one burl the size of a softball. I assume it was caused by some outbreak, be it fungal, insect, or unknown. I usually bring a couple home when I'm down that way. The driftwood on the beach however has been my go to for finding figured grain wood and there's a new inventory after every storm.
I like the old grizzled tree. It almost looks like its made of braided staves. Bring it the guts from the next time you clean some fish, one of a tree's favorite gifts.