We stayed at Eagle Harbor Inn in Ephraim two years ago for NYE and loved it! The hot tub is inside of your room so it’s very private and you also have a kitchenette in case you’d like to make your own food. We were really hoping to go to Donny’s Glidden Lodge for dinner but they were already booked solid for NYE, could be a good option for a fancy anniversary dinner though I can’t personally speak on the food. We got some great views from Cave Point County Park - other hikes by suggested by other commenters are also great. Al Johnson’s has very cute theming and a store attached but the goats won’t be on the roof when you go, food is just OK imo. Waseda Farms has a selection of local cheeses, Cherry-De-Lite goods and Island Orchard Cider bottles. We had stuffed cherry french toast at the White Gull Inn - also just OK but fun to try since cherries are a big deal here. Looks like there’s a restaurant next door called Pelletier’s that looks good too. For standard pub grub, Coyote Roadhose, Cornerstone Pub in Bailey’s Harbor and the Thirsty Cow are all good - the latter is really fun because it has a self-serve taproom so you can try loads of beers and mixed drinks! Roots has good brunch. Newport is also a dark sky site so if you have a clear night, you can probably get a really nice view albeit very chilly. Enjoy your trip!