Lou,
Even if the golf is limited, Tahoe is excellent, especially in the summer time. With activities on the lake, scenic hikes/drives, and night time shenanigans in the Casinos, there is no shortage of stuff to do.
My cousin was just out there last week, and safe to say I was very jealous, especially with this non-stop heat we've been having out West, the lake looked amazing.
P.S. Your bigger problem at Yosemite will be the crowds and especially so this summer as everyone is itching to get back out there. If you want to see Yosemite like you see in pictures, gotta go in the off-season and hope for good weather.