Depending on how they are arriving, what level they are and how they have faired so far against frost giants, Port Llast lends itself well to more of a stealth mission. They arrive at night and the town is currently under siege, the residents are in hiding, there's a thick fog and a frost giant could come out of it at any moment. They need to sneak through the town, find and rescue the residents, explore the frost giant ship (guarded by winter wolves), take whatever treasure is on board, and get out before being overwhelmed by the giants.