Yup, totally walkable, I usually walk because if I brisk it I can outpace the boat unless it's right there and ready to go when I am. Plus it's a very nice quiet walk.
We walk it all of the time and I can honestly say that the boat has never beaten us to MGM. If you have a room by the tennis courts or quiet pool it is even closer.
It was such a lovely walk along the canal w/ finely manicured lawns. We very much enjoyed it and it's one of our fondest memories of the BWV. We did it w/ a 3 yr old and baby and found it to be relaxing and nice and not long at all.