Just a half mile off 302 is the first of the two Sugarloaf Campgrounds. Offering large, wooded sites with more seclusion than the Zealand campground directly on 302, Sugarloaf I and nearby Sugarloaf II offer reservable sites with flush toilets and running water via hand pumps. More of the sites here are better suited to tents rather than RVs. I haven't stayed here, but I've driven through a few times this summer/fall to get a sense of it.
You won’t have cell service, but you’ll be in a prime location for hitting the trail early, whether you want to head up to Zealand, Hale, or over to Mt Washington. The Mt Washington Cog Railway, Franconia Nothc, and Bretton Woods are also just a few miles down the road.
For a short, family-friendly hike, you’ll find the trail to the Sugarloaf Mountains just after Sugarloaf II. There’s a small parking lot just before the Zealand River crossing and the trail is on the far side of the bridge. Venture to the end of the road and you can catch the road to Zealand Falls and Hut, a nice place for a picnic. In addition to Zealand, longer more strenuous nearby hikes include Garfield, Galehead, Twins, Washington, Monroe, Eisenhower and more. WMNF trailhead parking is $3/day or you can buy a weekly pass at forest service and other locations; your annual National Parks pass covers parking, too.
Zealand Rd is closed during the winter, opening in the spring only after mud season has passed and the road is dried out. The campground opens after that, in late May and is open until Columbus Day. Print your reservations before you come.
For a shower, head south through Crawford Notch to Dry River Campground where there are coin-operated showers. If you are hiking or exploring in Franconia Notch, there are coin-op showers at Lafayette Place, too, but parking on weekends is a nightmare.
Fosters’ Crossroads in Twin Mountain and Bretton Woods Market and Deli are your closest spots for picking up snacks or forgotten items.