In addition to the skulks, I used shriekers and shank shrubs. The shrieker is an old school critter that I remember from my first adventures. But I like to add a little something. Something that the party can use. Hackmaster has details on what can be 'harvested' from a creature. For a shrieker, the party can harvest the meat to sell. It's quite good, tastes like shiitake mushrooms.
The shank shrub, not sure where this creature originated, but I saw it on the pages of my Hacklopedia Vol. VII and decided to make use of it. A nasty creature that kills making him, or her, into shrubbery. How can you not like that?
Stalker Island was created for my sandbox using the Swords & Wizardry Light system. I'lll have more information about the sandbox soon.
Possible hooks for Stalker Island:
Lastly, I want to thank my patrons. This has been a great month. I've gained six new patrons and three patrons increased their pledges. I appreciate the support.