My players are playing an island hoping adventure (each game is a new island unless they wanted to stay and explore more). They're a beginner level party (Lv.1, 5 man group) who act as the away team for an exploration and discovery navel ship (think Star Trek TNG) and secure a safe landing point for cartographers, Botanist, etc, to camp. This island will have some coincidental fog (natural) that blocks LOS from the ship to the island just as the group are over half way. They make land and after some time (about 6 hours give or take) of exploration they encounter their first "undead." After finishing TLOU1 for the umpteen time, i had a wicked idea of turning the undead zombies into a more plant like Clickers. Basically I wanna change out the Undead type for Plant, making them blind, increasing their passive perception, and giving them advantage on perception based on hearing). Am i doing this alright or am i missing something? I also don't mind any helpful advice or if anyone else had done something similar.