We've written before about the advantage of visiting resorts during  shoulder season, that sweet spot before and after peak season when prices tend to be lower. A great example: Minnesota's Lutsen Resort is running a Quiet Season 3rd Night Free offer now through June 2 (excluding Memorial Day weekend).  Families have been drawn to Lutsen for more than a century by its ruggedly beautiful setting along Lake Superior's North Shore and its line-up of complimentary year-round activities, from kayaking and swimming in the summer to night hikes and guided snowshoe tours in the winter.   

If you book two nights before June 2, you'll get your third consecutive night free.  Choose from three accommodation options—lodge room, townhome, or log cabin—with rates ranging from $59 a night if you stay in the lodge to $269 a night for a weekend stay in a log cabin handcrafted by local artisans.  We test-booked the rates and it's a straightforward 3-for-2 deal, which means you'll save a solid 33% off your stay.  Book online or call 800-258-8736 and ask for the "3rd Night Free" offer.