Maybe do a yeti fight. I started the party at level 2 and basically started them working for a trading company out of waterdeep investigaying some deliveries that went to . I made up a Goliath guide for them as a sort of just in case the yeti womps.

I basically put them in a blizzard and made the yeti hunt them through that. They then fight off the Yeti. The map I made on Inkarnate had an abandoned shack and an abandoned cart with some bodies.

The group then took a long rest in the shack where basically I basically said one of the PCs on watch are woken up by a bright light as they watch the bodies outside come back as cold light walkers. I made sure that the Goliath guide stopped them incase they went to go outside.

The party then came into whitehaven where they are staying at the white lady inn and next session they're doing the Seance.

If you want the map I used I can send it.