I see in your signature that you have a couple of WSM's. Assuming you're using one of them, is it possible to leave a little earlier and take a WSM with you? Smoke the butts there at a little higher temp so they are done for 6:30 or 7:00.
Your hunting buddies might enjoy witnessing the whole process...
All that you bring into the lives of others will come back to you in your own. Good or Bad.
Large UDS, Small UDS, CG Akorn, NB Offset, Home Built Offset, Vision Classic Kamado, Green Mountain Daniel Boone, Weber Gasser, Smokey Mountain Cabinet, and several Weber kettles of various sizes.