Every day at the moment, but we're waiting for it to go to site (which it did yesterday). I have to drive past the estate to go to/from work, so it's not really that big of a stretch for me to do it. It's also only 7 minutes from where I'm staying, which definately helps a lot.
My parents used to drive up most days when their build was happening and that was about a 20-25 minute drive each way. They had no issues doing it