There is a post in feb 2002 and another 2004 stating that you will agro mobs in PoG if you drag corpses w/o invis.
http://everquest.allakhazam.com/db/z...tml?zstrat=103
As for the CoV faction dragons (Whoushi and Rolandal) in WL. I can't find anything, but I would assume (I'm pretty sure it was like this back in the day) they would agro if you attempted to pull a KoS corpse past them w/o invis.