Originally posted by WhamyKaBlamy:

Grab a shield, mace, bow, poison resist potions and some health potions. Take your best food obviously. Find a nice peninsula that wouldn't take much to block off - get the boat near enough to jump to the shore. Bring along a few stacks of wood and the supplies for a portal.

Jump ashore, kill everything with the mace and shield, shoot any leeches going for the boat. If there's draugr archers, I'd recommend 'corner pulling' them; Hide behind a tree so they come close, jump out and whap'em with the mace. If you're not confident with avoiding or parrying their attacks they can hit pretty hard.

Once you feel safe enough to pull out your hammer, throw down some work benches to cover a fair bit of area and then block off the peninsula with spiked walls and a gate. Then start getting the place fortified and throw down your portal. Blobs can jump spiked walls, but you can raise the ground a couple of notches along your wall line to make it impossible for them to jump over, but to be honest you should have poison resist on as soon as you go to the swamp and a single blob won't be causing much of a bother once you've got walls up.

Also, a hoe is really useful in the swamp - you can make paths to walk on by levelling the ground so leeches can't hit you in the water.

This was the original idea behind building on a sandbar, but it was too close to the plains. The rest of the swamp coast is a straight line, with an other plains biome on the other side. So, no handy peninsulas unfortunately.