.. I can't answer for Herman but I can explain why I initially mentioned it.
1) the overall appearance still seems ratsnake so a corn x ratsnake (of some form) seems probable.
2) the only ratsnake that came to mind which has a silvery earth tone coloration was bairdi's. The silvery earth tone seems to be the mask/influence on the cornsnake coloration.
3) I didn't think pituophis(bull/gopher/pine) was likely since the main colors there, in general, are yellow and brown/black.
4) the semi striped pigmentaion in the picture reminded me ocf some pics of bairdi's.
I found a couple of pictures online that show the similarities I am talking about.
First is your picture

Next is a photo of a Baird's from www.nearctica.comherpssnakescolubridEbairdi.htm

Next is a photo of a Baird's from www.blairsociety.com

Hope this clarifies some of the similarities I was seeing.
Sean.
-----
1.1 BRB
0.1 Pacific Gophersnake(unproven Hypo)
1.0 Amel Pacific Gophersnake
0.1 Striped Anery Pacific Gophersnake
1.1 Triple Het TPRS's
0.1 Silver TPRS
1.1 Amel Bloodred Corns
0.1 Abbott Okeetee Corn
0.1 Blizzard Bloodred Corn
1.1 Thayeri Kingsnakes
0.1 Reeve's Turtle
0.2 Amstaff's
1.0 Pudytat