Takes about 15 mins in the car for me. About 7 or 8 miles I think. Last course was a bit closer, but this one is better.
I would regularly travel anything up to about 30 mins if the course was good enough. Wouldn't want to go much more than that, as petrol costs start becoming a factor, especially when I'm off work and playing every day.
Garden backs onto the 6th tee, so I can be on the course in about 2 minutes! If I go to the main entrance / clubhouse, 15 - 20 minute walk / 3 minutes in the old jalopy!!
13miles(ish) and around 20 mins driving there is a club a bit closer but it is more expensive and wet for a few months of the year, and I prefer links golf anyway