Possibly. But, the good news is that the hotel "exchanges" are rarely good deals.
As an aside, I just confirmed a July 4th week next year at Marriott Summit Watch in a 2BR. Summer Park City is not a hard exchange, and I would not have used DVC points on this--it would have been 240 points.
But MSW is right at the base of Main Street (lots of restaurants/shopping), across the street from the Town lift (open in summer), and an easy 15 minute walk to the base of the Mountain Village, where the adventure park is. The Canyons Village down the road a few miles has a multi-day festival the week of the 4th, which should be fun. This was with an unbranded (non-Marriott) week, so was a pretty good deal.
Finally, if you are an extreme roller coaster fan, I highly recommend the summer bobsled at Utah Olympic Park. That was intense.