No, it is not legal to camp anywhere in Maine. Camping is allowed in designated campgrounds, state parks, and national forests. In some cases, you can camp on private land with the landowner's permission. Wild camping, also known as dispersed or primitive camping, is allowed in some areas of Maine, such as the White Mountain National Forest and the Appalachian Trail. However, it is essential to follow the specific rules and regulations for each area where you plan to camp. You can find more information about camping in Maine on Hipcamp.