Personally, although I'm always more nervous than with subsequent flights, I'm not effected by spectators on a maiden. I'm too focused on procedures to be bothered by others watching. Maybe more so than any other flight. I always have a flight plan, and stick pretty close to it. With large expensive planes, I have a caller reminding me of the flight plan, and always wait for a clear pattern (no other planes to watch out for).

I maidened a 90" P-38 at a local war bird fly in a couple years ago. One engine went lean and quit on the 1st flight, about 8 minutes in. Got the gear down, and landed in the middle of the runway, on one engine, with a P-38, on the first flight. I actually got an applause, and was glad I had witnesses.