Yes, absolutely. Wii Sports Resort requires Wii MotionPlus—either the add-on dongle (snaps onto Wii Remote bottom) or a Wii Remote Plus (black/red/blue models with "Wii MotionPlus Inside" printed on the face). The game will not launch without it.
Insert Wii Sports Resort disc. If the wrist strap safety screen appears, then "Wii MotionPlus required" screen appears—you don't have it connected. Connect MotionPlus → restart game.
No workaround. No cheat. MotionPlus or no play.