I highly recommend not making a beach landing in the swamps until you are well prepared to do so. Last time I tried that, an abomination popped up right next to my boat, and I died soon after. I respawned on the small half BF / half plains island that I launched from with no way to get to my stuff or get off the island without going back to world spawn.

Even if you used a portal to get near the swamp, you're still going to have to somehow get back to the swamp and likely do another beach landing to get your stuff back.

Find a safe biome near the swamp that you can enter from relatively safely. You may have to search the swamp to find a crypt, but IMO that's much safer than dealing with the mobs that converge on you when you do a beach landing.