The buck is marking its territory i think.. They do that to show other bucks that its their territory and i think they urinate on their rub after making it. Im not 100% sure on that one tho.. I'd say your best bet is to go get some doe-in-rut buck lure-or doe estrus and hunt rubs scrapes trails and around white oak trees. Can you only use shotguns up there? If so i'd either buy a blind or a self climbin tree stand some good brands of self climbers are summit and tree cat i got a tree cat and i love it