My group defeated yagluth 3 weeks ago and we got only 2 mistlands raids (seekers). Most of the time we get bats event which is probably the easiest one you can get. We also got skeletons event, blobs event, trolls event and you are being hunted events. I want to say you won’t get only mistlands event so you don’t need to worry too much.
If you want the safe spot, an island is the best choice since mobs cannot spawn in water (except for the bats). So find an isolated island far away from big landmasses and spam it with workbenches to prevent spawns. Raids will happen, but enemies won’t spawn.