Your host, even a gazillionaire friend, is still human. If you've been invited to stay at their fabulous place in the Hamptons, Provincetown, or Deliverance, add to their graciousness. While cost may not be an issue, hosts need to feel their efforts are appreciated, especially if they'll be holding your hair/tears/sexual advances in their own home. If you've uttered,"Oh, I don't really drink that much. I'll just bring a cheese board.", you can go to hell. Wineboy's own guest experiences say: If the stuff is good, Helen Keller will ask for seconds. Don't drink your host dry. Bring a few inexpensive Sauvignon Blancs from France or New Zealand (crowd pleasers and screw cap wines are perfect for the beach and boating!) and a nice bottle for the host to keep on hand. Food is for Asians and Native Americans.
2. CONJURE A SURPRISE! MIDNIGHT EMOTIONAL BREAKDOWNS DON'T COUNT
Fluorescent panties with sparkling lights reading "EATS", jet skis, an Italian card game you learned abroad, the ability to poach eggs in the shape of a smiley face, or some unique contribution to add to the experience of letting loose, laughing and stripping amongst friends. Vacation is "me" time in as much as it's "What can I do to improve each individual's quality of life on a short stay?". If you're with an awesome group, they'll have the same mentality. Thinking back, I assure you, your best camping, touring, etc., experiences had this in common (where virginity wasn't simultaneously lost [different post]). It's when "me" time is about one person accomplishing an agenda that "vacation" turns into "Weekend at Bullets".
3. BE GRACIOUS AND RESPECT YOUR HOST -- EVEN IF THEY'RE A RIGID AS*SHOLE
You accepted an invitation; you didn't write your own. Your host has their own ideas in mind, perhaps even a full schedule (if you've been e-mailed one in advance, SEE: Contracting Small Pox) and while you're expected to bring your unique silliness, it's their casa. You might want to sleep till 3 pm but remember you can sleep after the excursion to "find the perfect starfish/beach knockers!". Better: all of that wine you brought, have a little, dahling: Do the dishes. While drinking. Make your bed. While drinking. And offer to clean on the last day. While enjoying what? The contents of your host's nightstand, you drunk. If you leave without knowing a little more about everyone, that's just selfish.
After restraining your emotions, cleaning up after yourself and resisting being the "baby daddy" to the townies, you deserve a vacation from your vacation. Bring a special bottle for yourself. Or, as I've done in the past, a flask full of ancient Scotch (though usually empty day one; Wineboy is an only child). Scotch gets you started. Once everyone has left the house on their farewell tour of the water or fetching tight-ass supplies like collar stays and moist towelettes for the trip home, decant a nice bottle of red. Something strong. Cali cab. Or jalapeño vodka. Then drop in the drug of your choice (nothing too showy). You've put up with these people and their "ishes", kept yourself from a breakdown for about a week too long and haven't had decent random sex in decades. Pour a glass for everyone upon return from Dollar City because, as we first learned: "me time" is what I can bring for everyone else.