Make a few alts, multibox them, go into the lair and build the hearth fire with one of them while the rest are tanking the wolves. Escape with the hf alt. Find a decent amount of aurochs, clover and rope them. Teleport back to your hearth fire.
Somewhat tedious endeavour that most players can't be bothered to engage with, but still. Judging by the fact that the devs removed an ability to use the mini dungeon entrance with roped animals, they should consider this an exploit. Can be easily fixed by removing the option to build hearth fires inside the mini dungeons (why is that a thing in the first place?).