I have a 30 foot evergreen in the front yard I string lights on every year. What a pain! Last year I left them on since I didn't feel like falling. Some kind of critters chewed the wires up. Had to take them down, splice it together, and put it back up. This January I will not be leaving the lights up.
I'm finished with everything as of last night! Outdoor lights are up, we cut down our tree and decorated it last night. Then the final touch was adding the new 10-point express train set! It beats our old train that always came off the track.