Perched at the tip of Cape Cod — or at the end of the world, as locals like to say — Provincetown is a quirky beach community favored by artists, drag queens, L.G.B.T. people, heterosexual families from the suburbs and oddballs on the run. Provincetown combines small-town charm with big-city spunk, and it’s nestled among miles of peaceful dunes and seashore. If you want solitude, come in the winter when hardly anyone is here — or anything is open. But if you’re after warm weather and high-season theatrics, arrive in July, August or early September. Be careful about what summer week you choose. Many have a theme, and your Provincetown experience will differ whether you’re here for “Family Week,” “Girl Splash” or “Bear Week.”