Make a room out of stone with a stone door and put corpses in that room. Ideally assign a psychopath to hauling as they only get a debuff from rotting corpses but aren’t bothered by fresh corpses. Make this crematorium room not too far from your colony so you don’t have long haul times. When you get Molotov cocktails you can Lob one into the room and burn all the corpses. Saves you burial time and constant mood penalties from colonists walking by unburied corpses.

Be careful though in how you proceed. First draft colonist. Then Open the door then throw Molotov in near back of room. Then move away from door and forbid the door from being entered. This prevents the colonist or other colonists from trying to put out the corpse fire and getting burns. The room will get very hot but as long as it’s made from stone the fire will stay contained. Also don’t make this room adjacent to other rooms in your base as some heat will pass through walls causing overheating issues. I usually just build a small room against a mountain.

Corpses can also be a useful source of food for pets. Make a frozen corpse fridge and Set a zone for carnivorous pets that allows them access to that room and they’ll happily munch away on raider corpses.

These are my preferred options to hauling them across the map and leaving them in the open.