Are all the achievements for Christmas stuff able to be gotten in one map? Probably not, as one is only available in Seattle. Trying to figure out how to get all the achievements.

Look up the guides that have been released, or if you want to do it legit:
Each official map has one achievement (PEI, Russia, Washington, Yukon), two more are found on the Elver curated map. Getting them requires a tiny bit of thinking, but they should be self-explanatory.
Happy Grinding!