Hi,

I plan to start a bandit/raider/criminal character and I was thinking that the Broken Oar Grotto makes the perfect hideout for my Character. But does this dungeon ever respawn its mobs? Or once you kill them they don't get respawned after awhile

Thanks

Nope it is safe for storage.

http://www.uesp.net/wiki/Skyrim:Broken_Oar_Grotto

Have fun!

Thanks