I haven't seen any special enemies, but it is crawling with high-tier Shivers and Bowtorn (mostly Corrupt). According to the wiki, Shivers have a chance to drop Jonas parts and gears so I've been trying my hand at it. Stressful as hell tho. Elk archery is the only reliable way to outpace the Shivers, and the fact you can accidentally skewer your poor steed makes even harder. Going back for the corpses is not easy.
I didn't actually know about any caches at that location! Besides hunting the outskirts, I got in and out fast.