How to get the key Westland survival guide tips on new Winter Festival event fast way to get keys 

I got some in the first area.winter Forests been trying my best to find some lol no bridge yet for me but managed to find them the one to the left of the pass or left of indian tribe place and the one on the far right gives copper keys. I dont know about anywhere else. I need more weapons for exploring lol running out also my healing items haha but yeah so far those two zones i know have keys for those without bridge fixed.