My home course in Nashville was/is a 6+ mile walk with many hills. I walked it almost every day. 2.1 miles seems like it would be pretty easy, other than the fact that its pretty hot here in the summer.
BTW pull carts don't count as walking in my biased view
. Just walk briskly and lug the bag, its usually quicker and forces you to carry less junk. The exercise makes you feel so good once you are used to it.