RE: How far would you go?
How bad do you want to hunt those properties? Both are elderly men who have probably been working on the farm since they could walk. Small price to pay for permission to hunt someone elses property. It sure beats having to lease hunting land with $$$$. With the honey suckle you will need a herbicide like tordon (sp?) to keep the stumps from growing more limbs.
However, I would also explain that you also have other responsibilities and you'll do what you can but cannot ignore your duties.