You will need significant snow before you need chains, Your LC should manage a foot to two feet without any bother, once you are over two feet you need to know why you are out as the roads are most likely blocked with cars
Off road in the snow is great fun , but you need to know the land very well as the snow hides everything, ditches holes, walls etc and therefore has a high risk of damage and likelihood of getting stuck.
I would say 3 feet is the limit for a 4x4 before chains, you can get away with deeper but it needs to be fresh, lightly compacted and powdery otherwise you just bulldoze a compacted wall in front of you.