Couple tips: technically illegal to cross state borders with it, but my best advice is be careful driving through New Hampshire. They do recognize out-of-state medical cards...just be careful with the quantity.

Maine has excellent products and fantastic prices. Make sure you go to medical place and not recreational. They take out-of-state cards just fine. Prices shown on the shelf include all taxes.

Edit: There’s a place in York that’s very fairly priced. Tops Farm.