I don't move around in tremor much, I stick to the roofs and pick people off. There's a few more "rushing" maps...warhawk...the tank factory...octane
Octane tends to be pretty dynamic also. Flooded as well. I don't encounter that many campers in either of those.
Oddly, as large as Whiteout is, most games I've played on that map, everyone tends to bunch into the middle near the first cabin, so that one is relatively fast paced also.