Danny, I speak from experience. Back in 1973 when energy prices went through the roof, good firewood like yours was being stolen all the time, especially if it's all split. Most thieves will not steal the big billets because that takes work to split up.
Regardless, think of it this way. They are selling 2-cubic foot packs of split hardwood logs at the supermarkets for around $10 apiece in my neck of the woods. Figure out how many of those sacks you could fill with your stash (say six good logs) and multiply by $10. That's what your wood is worth on the retail market. A BUNCH!
p.s. My flat-coated retriever would guard that wood with her life. God bless our best friends.