I never drive in them. Just flick them off and drive barefoot. If you've never done it, it only feels weird for the first five minutes, then you're fine.
I drive in them when driving a automatic, but prefer to drive barefoot when using a clutch, maybe they are more prone to slipping when using a clutch
I was always ambivalent at best about flip flops at a nudist venue...honestly, wearing anything at a nude beach or resort makes me self-conscious. However, since moving to Florida, I've embraced the necessity of some kind of footwear when I'm walking on splintery boardwalks/beach ramps, or on gravel and hot concrete at a lot of resorts.
I used to also feel like it was absurd to pay more than a few dollars for flip flops, but I've grown wiser in that regard as well, haha. I really like the Cobian brand. They are comfortable and provide really great support while not being too "fancy" or casual. Easy to clean too and they last a long time. My better half likes Hey Dudes brand...they are nice and pretty comfortable, but a little too "sporty" for me.
Flip flops are my foot covering of choice when I cant be barefoot. I would say over the years I have learned that all flip flops are not the same. I have tried many and settled on Havianas as my favorites. I own several pair and reviewed them on my site a couple months ago.