Didn't we have this same conversation last year? :-)
I used the Cabela's flats sneaker for my trip (fit my budget and my narrow foot)worked great also used hiking socks with high spandex count and rolled them over the top of the boot to keep muck out. Went through some pretty soft stuff at times and very little got in my shoe. I also brought a couple velco straps as an extra seal but didn't need them.
"Nothing's Free" (Dad)