I think you meant Teton Valley and Teton Pass not Tenton
The Wyoming highway department suggest you take the you route that you mentioned...from Victor, ID on ID 31 to US26 follow US26 to US89 and US89 to US191 into Rock Springs.
I've driven all those roads at one time or another and I don't have any memory of there being any particular issues. Of course current road conditions must be taken into account.
2003 34' Georgetown on W20 Workhorse Chassis. UltraRV power mods. Front Sumo Springs, Rear P32 Sumo Springs, UltraRV Track Bar.
1998 Jeep Toad.