Even though the owners of the old home place have died, someone must now own the property. Wouldn't it be prudent to try to find out who currently owns the property? County tax records should reveal the owners name to you. The property (and bees) could have been left to another family member, children, heirs, etc. Once you find that out, you could contact the current owner and inquire if they would allow you to have at the bees there. That said, I wish you the best of luck. Perhaps you will be able to get some free bees. I will be curious to learn what you discover.
"My child, eat honey, for it is good." (Proverbs 24:13)