I agree with Steve that the best ones I know have a broad circle, probably around at least 3 65 foot wide parking rows, and with driving direction going counter clockwise to allow easier guest drop off. That way, the circle is big enough to put the pro shop on the near end with its own drop off, the main entrance in the center, and the dreaded service entrance on the far side of the clubhouse where its as hidden as it can be.
Don't forget the vertical element in design. While I don't think multileve clubhouses work well (ask any clubhouse manager how much money they lose with a second floor dining room on account of stairs) you could possibly sink the parking lot so it isn't visible from the entry road, and raise the clubhouse to make it a focal point.
On small clubhouses, I have often recommended that the cart barn be adjacent, and styled like the main building so that it makes the clubhouse look bigger. Depending on climate and site, if the building has any trellis structures, covering all or part of the cart staging area with a similar structure might be a nice touch you could get away with in this hottest of all summers. Certainly, some kind of covered pavillion for the bag boys would be good also, as would different paving to mark the stopping point.
It is a tricky design problem, and one that generally doesn't get the attention it merits. Don't count on the building architect to be much help. They seem to stop thinking outside the walls, and sometimes don't even want you to use curved paths, as they "might contrast with the geometry of the building" even if those paths are going right where they need to go.