This works as long as the region your stack starts in is not the most difficult terrain to move through of the surrounding regions. For example, say you want Pontiac and his stack to search and destroy in the vicinity of Oswego but to end the turn back in Oswego. Set march orders like this Oswego to Oneida to Oriskany to Oneida to Gannagaro then press delete once and Voilà!, a search and destroy route that starts and ends in Oswego!
Probably you guys that are smarter than me figured this out long ago but, since I didn't see it posted anywhere, here it is for us dumber folk.
Quando omni flunkus imbibo bière!