Count difficult journeys, not attractions
A family itinerary usually benefits more from fewer changes and a short final walk than from living beside one attraction visited once. Mark nap or rest breaks, pram or mobility needs and the places that repeat. Then test the hotel-to-station route, not only the district name.
Choose central or east-side from the fixed anchors
The official Seoul guide groups the palace and traditional-street core separately from Gangnam and the east-side areas. A central base is efficient when historic and first-trip sights dominate. A Jamsil-side base can be logical when Lotte World or repeated east-side plans dominate, but it adds travel to west and historic Seoul.
Room rules matter more for families
Confirm maximum occupancy, bedding, connecting-room availability, lift access and cancellation terms on the live property page. Do not assume a room that appears for two adults can legally or comfortably take the full family. Choose the area first, then verify the exact room before payment.