Recommend you download a PDF of the WV hunting regs (link below):
http://www.wvdnr.gov/hunting/hunting_regs.shtm
http://www.wvdnr.gov/hunting/hunting_regs.shtm
I would suggest you scout the farm with your friend, not only to know the property boundaries, also to see what kind of range for your shots you are looking at.
Rather than trying to hunt with a marginal caliber, consider getting a used deer rifle set up for the job. Wherever you find used firearms, there are always a couple of scoped bolt actions in typical deer calibers available.
If he can show damage from the deer, your friend may be able to apply for a nuisance permit. With the permit, there are fewer restrictions on when and how you can hunt and you may not even need the expensive non-resident permit to do so.
And as far as the Coydogs/Coywolves, PBS did an excellent documentary:
https://www.youtube.com/watch?v=a9-Q1eIFA_U
If you can't kill it with a .30-06 you probably shouldn't be shooting at it LOL