I've read that one's feet grow/spread out during a thru. I'm off to buy new trail shoes in a couple of days and was curious if I should buy a size larger than normal? Can any thru-hikers attest to this foot growth and if so tell me how you dealt with this issue on your thru? Half sizes aren't an option for me, for I normally wear a size 12. (The next size up is 13 in most shoes.) Thanks in advance!