Passing without a trace means dragging branches to sweep away tracks, if you don't have a level 1 druid or level 8 ranger in AD&D (Mark Nelson, I believe, Wilderness Survival Guide, TSR, 1986)
The mage Bavarius visits the lair of the black dragon Sinequist (Mark Nelson, from Thomas M Kane's AD&D adventure "The Wounded Worm," Dungeon 8, Nov/Dec 1987)
Monsters: The Portfolio, Limited Edition (Avalon Editions, 1988). Thirteen black and white plates by: Hilary Barta (1), Mike Mignola (2), Moebius (1), Mark Nelson (2), John Nyberg (2), Mitch O'Connell (2), Mike Schneider (2), Charles Vess (1).
Found 12, mostly poor quality images, but I can’t find the second Nyberg image. The Mignola images look to be original art but the rest are prints.