Well I didn't gamble, drink, or overeat in Vegas. Tried shopping but was pretty restrained there too. Naturally, they asked me to leave.
I took the 93 south over the Hoover Dam. Lake Mead was a really cool sight; this big blue lake in the middle of the desert. Interstate 40 in Arizona has a 75 mph speed limit & was mostly semi traffic; I must have passed 50 of them .. so not an easy drive. The turn-off to the Grand Canyon takes you on to a little stretch of old Route 66, so I bought a bumper sticker.
Today, I just walked along the rim & explored the village (and did laundry). Tomorrow, I'll do a hike into the canyon. It's sunny & about 70 F.