Yeah I'm doing that myself sometimes, it's pretty much the same amount of casts, from the initial spot I've wrote in the guide you get like 99% casts of how many you should, barely 1% shallow water or no path. Anyhow, since I've seen nobody said anything about it I thought it's not useful, therefore haven't updated with the other place.
P.S.: Don't foget to use Elixir of Camouflage :P