I just returned from 4 days in Yosemite. Saw 2 SMB's on Friday 4/9.
One was a tan Ford 4x4 (I think it was an EB) with a bunch of bikes on a hitch mounted bike rack. Looked like it might have had 35" tires. Saw it pulling into the parking lot across from Yosemite Falls.
The other was a white Sprinter. Don't know much about Sprinters but seemed to be a low roof with poptop. Saw it parked near the big meadow close to Yosemite Falls.