Multiple trees are good... my DH's family always put up an artificial tree, and it went up at the start of December. My family, a real tree and it went up Christmas Eve. Now as we all know, anybody else's family does Christmas (or whatever other celebration is on hand) All Wrong, always, so our first Christmas, we freaked out at each other.
Compromise. A little tabletop tree, with mini decorations, on top of the cabinet from the first of December or as soon thereafter as we can remember where we put it last year. A full sized real tree in the corner, usually going up the weekend before Christmas.
Sometimes, more is better.