Last time I was at No Name (about a week ago) there were orange construction signs at the Eastbound on-ramp saying "Rafting Access". It did not say anything about commercial access, so I'd try that rather than go all the way around to Hanging Lake and turn around. Of course, if that access is no longer available, then you'll have to go all the way back to Glenwood (Exit 116) and turn around.
Damn, after typing all that I just noticed that you'd be comming from Summit, so you should be fine to exit at Grizzly from the Westbound lanes.
"A witty saying proves nothing."
- Voltaire (1694-1778)