Where to stay near Guderup has a straightforward honest answer: stay in Sonderborg. Guderup is a small village on the island of Als in southern Denmark, without a hotel or guesthouse scene of its own, and travelers exploring this part of the country base themselves in Sonderborg, the island's real town, a short drive away. Als itself is a genuinely scenic island, but Guderup's role in that picture is residential rather than touristic, and travelers should plan their nights accordingly.
Sonderborg's lodging covers a genuine range for a town its size: simple guesthouses and budget hotels near the harbor and town center, a solid run of mid-range hotels convenient to Sonderborg Castle and the waterfront, and a small premium tier in properties overlooking the Alssund strait that separates Als from the Danish mainland. That range is worth planning around directly - Guderup itself has essentially nothing comparable, being a residential village rather than a visitor base. A short walk from Sonderborg's main hotels puts travelers within reach of the harbor promenade, the town's restaurants, and the ferry and bridge connections that link Als to the rest of Denmark.
Book Sonderborg hotels ahead for the summer months, when Danish and German visitors alike head to Als for its beaches and the mainland connection makes it an easy weekend trip; the town's better waterfront properties can fill early in this window. Outside summer, availability eases considerably and rates are more flexible, though a handful of smaller guesthouses reduce their offering over winter. Card payment is standard throughout the area, and confirming a booking directly with smaller properties is straightforward given Sonderborg's compact size and its short, easy connection out to villages like Guderup. Public transport and cycling routes connect Sonderborg to villages across Als, including Guderup, making a car unnecessary for most day trips even for travelers without one.