I was long haul crew in my previous CC job & i used to commute 3 hours & then operate a 11 - 12.5 hour flight. Did it for 3 years & never missed a flight or encountered any problems
During standby duties i would stay with friends in the area overnight or just drive down, relax in the crew room then go back home again afterwards. I know some crew used to drive half way or so & then sit at a motorway service station but i always used to drive the whole way, just personal preference i guess.
Most people at my old airline were commuters. If i went back to a UK based CC job (i'm UAE based CC these days) i would most likely opt to commute again. I loved my job so driving for 3 hours every 4 or 5 days never really bothered me.