User blog comment:KamiOfWind/Revision plans/@comment-24281887-20150903041933

I could help.

Laughing Coffin was created at an unspecified day in SAO, so play it safe and make the date at around New Year's Eve of 2023. That's the time LC went public with their guild. They made their first murders then.

As for floors with a field, use the 2nd, 3rd, or 20th floors. They have forests and mountains. Floors 28 and 35 should also have fields.

As for a floor to assist in, I'm not sure. Possibly, you could use this link to find what you're looking for.

That's all I can help out with for now, Kami. Let me know if you need anything else.