For the wiki, use Google to search and look at the cached version. You can also use the Wayback Machine (
www.archive.org) to access cached webpages. (Someone posted a link to the Wayback RoB Wiki directly here somewhere.)
As far as the crabs and hedgehogs, wear gloves, even poor man's gloves (needs 4 leather if memory serves) to decrease odds of injuries. There is no treatment for them other than time. Watch out for infected wounds as these are a pain to heal early on (so warning for any other damage you might take, too.)
If your claim covers an entrance, yeah. We're not sure if they have a purpose or are just abandoned animal dens. Feel free to use them like a cave entrance, or even a free "house". (You can build in them as if it were a house--cupboards, table & chairs, etc.)
Yeah, ammunition softcaps hides of anything shot, so either have high quality ammo or learn to use the hunting combat exploits... or just man up and fight them fairly. Up to you.
As for quests... it's up to you if it's worth the time. I've enjoyed them. You can get EXP, LP, artifacts, and hunger removed.
Opinions expressed in this statement are the authors alone and in no way reflect on the game development values of the actual developers.