Hmmm...I've gone in Stanton twice, most recently in 2008, but with an outfitter driving who pointed us to the trail -- which was off to the right of the lot we stopped at, down the hill.  There are some stairs once you get over the brim & then boardwalk later.
I'd provide GPS coordinates, but I didn't have my GPS on that early. -- scratch that -- I did have it on & here's the first several points, I think the first is in the parking lot & the next few are on the trail...

7/26/2008 9:21:00 AM 1418 ft N48 39.642 W91 20.370
7/26/2008 9:21:40 AM 1418 ft N48 39.650 W91 20.381
7/26/2008 9:22:18 AM 1417 ft N48 39.652 W91 20.402
7/26/2008 9:23:03 AM 1417 ft N48 39.646 W91 20.406

It shows mostly west from the lot and then due south for a bit...but by that time you're on the trail.
Good luck next time!  -Tom

Went in thru Stanton 2 years back. It is to the right (west) of the parking lot down a hill... find it really surprising that you couldn't find that trail! I did hear about a washout last year, perhaps with the lack of use caused by the washout the entrance has gotten a little more overgrown.

Park