I got this from my grandad years ago and if your far from the truck it wks great take a 4-1/2' to 5' old seatbelt and sew loops on both ends and tie 2' of rope to the ends tie the head as short as possible and put the seatbelt across the chest and start getting it it beats holding a lead r rope and aloes u to use all legs
I don't drag many hogs out, but I drag deer every year. I do kinda the same thing I use one of these (the cheap one that comes with every tree stand anymore), and run the tree strap abound what ever needs dragging.
http://www.basspro.com/X1-Bowhunter-Safety-Harness/product/13031906213913/