As InStyle’s digital executive editor, Angela Matusik (pictured) oversees InStyle.com’s daily publishing and the brand’s social media strategy. She just returned from her fourth visit to Maine, and is already missing the blueberries and lobster. Follow her on Twitter @angelamatusik.

Every year, when July turns into August, my family and I travel to Mount Desert Island in Maine where you’ll find the town of Bar Harbor and the state’s biggest attraction, Acadia National Park. Acadia is truly a wonder—a magical place where pine forests meet rocky shores. There are miles and miles of hiking trails, carriage roads, mountain vistas and tranquil lakes to explore. Best of all, when New York City is a hot sticky summertime mess, MDI is cool and quiet. I’m not alone in my revery of the place; a USA Today poll recently found Acadia to be the most popular National Park in the country—beating out Yellowstone.

Smart packing is essential for a visit to Acadia, mainly because once you get there you’ll quickly discover that shopping is not one of the region’s strengths. Blissfully, there is not a chain restaurant, fashion mall or box store in sight. Everything on Mt. Desert Island is homegrown and local to an extreme. I’ve learned to bring what I need, and to prepare for a wide range of temperatures and activities.

Even though Mt. Desert Island is home to some tony types (Martha Stewart’s home Skylands is there) it is never flashy. Being an editor at InStyle means I indulge in the joys of dressing, so this trip can be a sartorial challenge. The key is to be comfortable, cozy, and Instagram-ready. Here are a few lessons I’ve learned.

Always Have an Extra Layer

Chad Hunt

Don’t even think about being out past sunset without an extra layer. It gets cold on MDI, with temperatures mid-summer dipping into the 40s at night. Tossing on a cream-colored, fisherman-inspired sweater that matches everything does the trick. This one from Nili Lotan ($465; barneys.com), has the bonus of being cashmere, so it’s extra soft.

See more of Angela’s Maine travel essentials in this gallery.

Perfect Your Sea-Side Style

Chad Hunt

Even the most landlocked visitor will turn into a seaman at heart on Mt. Desert Island. Nautical stripes with a crisp pair of white jeans is my go-to outfit because it can take me from ferry boat to dinner. (Our favorite spots are Fiddlers’ Green in Southwest Harbor and a must-visit, Thurston’s Lobster Pound in Bernard. Be sure to sample some blueberry ale made at Atlantic Brewing Company nearby.) This year I relied on Paige Jimmy Jimmy crop jeans ($179; paigeusa.com), a chambray shirt from Madewell ($78; madewell.com), and a light striped knit top from Nili Lotan ($270; barneys.com).

Protect Your Skin and Hair

Chad Hunt

There are two things that can be brutal on your skin in this corner of Maine—the sun and mosquitoes. I never leave the house without slathering on zinc-based sunscreen and I always tote along a natural bug repellant. Reply both liberally throughout the day. My beauty musts, from left to right: Oribe Molding Paste ($35; oribe.com), Neutrogena Wet Skin (great for kayaking; $10; neutrogena.com), Iwilla Remedy Bug-Off Insect Repellant ($10; iwillaremedy.com), Clean Summer Sailing Eau de Toilette ($59; cleansailing.com), Chanel Rouge Coco Shine in Candeur ($35; chanel.com), Obagi Medical Sun Shield ($40; lovelyskin.com), Davines Su Conditioner-Moisturizing Leave-In Mist ($18; amazon.com).

End Every Day Around the Fire

Chad Hunt

At the end of one of our adventurous days, we like to snuggle around an outdoor fire while munching on s’mores and watching the stars come out. Heaven!

Click to shop all of Angela’s Maine travel essentials!

Plus, see more Travel Like an Editor stories from InStyle editors.

—Coordinated by InStyle’s Senior Market Editor/Digital Correspondent Dana Avidan-Cohn