Question: Was the doctor (the owner of the sailboat in the beginning) in on Laura's planned disappearance? Or was the bad weather just a coincidence and gave her the chance to escape? Just though it was weird because her husband commented that she only gets on a boat like once a year, so I don't know how she could have planned her escape so perfectly.
weetie21Question: Does anyone know where the scene in the theater was filmed, where Julia Roberts is on the stage with the swing and the snow, and then backstage playing in the costumes?
Answer: Filmed at the Abbeville Opera House in Abbeville SC. From imdb Trivia: Star 'Julia Roberts' caused a controversy after she left Abbeville, South Carolina, where the film shot some location work. She said the place was "a living hell" and a "horribly racist" town and she would never return there again.
marfbodyQuestion: I don't live in the US; is it normal for a gym to contact next of kin and offer condolences when someone is believed to have died? Or is it for plot convenience? Where I come from, any cancellations of memberships, etc, would all be done in writing.
Answer: The woman did not work for the YMCA. She and Laura took swimming lessons together there and were friendly. The woman therefore felt obliged to offer her condolences. It was also, as you say, a plot convenience. There had to be some way to tip off Martin that Laura might still be alive.
raywest
Question: Why after receiving a phone call from Laura's friend at the YMCA does her husband go looking through all her stuff on the bed? Then he finds the ring in the toilet. It just makes no sense why he's tearing through her stuff.
Answer: As that was the last place Laura was before disappearing, he is just looking for anything that could provide a clue that she might actually be alive. He was not sure until he found the wedding ring in the toilet.
raywest Question: When she discovers the cans are all in order, why doesn't she run out the back door which is right there? Why does she run to the front door?
Answer: There's no way to know what she was thinking or why she chose to do that. She was panicked and reacted on impulse rather than logic. One thought, going to the front door is the most direct route to the main street where she could get to a neighbor or find other people more quickly. Backyards are more secluded and dangerous.
raywest 
Chosen answer: No, the doctor was not in on her plan. She had her escape planned for a long time, but was waiting for the right time. The stormy weather on the boat provided the "perfect" time for her to put her plan into action.
Ral0618