My husband really wanted me to ask this so here goes:
We're going to Vegas in June and initially we're planning on a three week stay. However, if the circumstances cooperate, we might want to stay for as many as six. The tickets will be booked for the three weeks, but they'll be changeable. My husband is really paranoid about U.S. immigration and he thinks that if we overstay the original three weeks, as will be declared to immigration, he'll be in violation of his visa waiver and will get bounced next time he tries to enter.
He has been hassled (he thinks) by immigration before, while trying to enter. Never pulled aside for additional questioning or anything like that, and never in Vegas, just in NY but he thinks the DHS is out to get him.
So finally(!!!) here's the question: if we change plans mid-visit and decide to leave later and we don't stay over 90 days, will we have issues on exit or later on, while attempting to re-enter?