Overall, Summit was a really great experience. For families with kids, I compared it to a "pre-teen version of a Jellystone resort." There were SOOOO many activities for my monsters to enjoy: Tennis, volleyball (sand and water), tether ball, horseshoes, river access, pool(s), etc.
One thing that cracks me up in GSC reviews are the number of complaints about WIFI access in parks. When I go camping, my goal is to get AWAY from "modern conveniences." HOWEVER, my kids appreciate their connectivity, and the WIFI at this resort was STELLAR. Not only were the monsters able to connect ALL of their devices, but the Roku we brought along for the TV connected and streamed with absolutely no problem (and we were probably the furthest campsite away from any of the resort entrances)!
The bathroom facilities, particularly the newer ones nearest our campsite, were AMAZING. The cleanest, nicest, well kept restrooms with LOOOOOOADS of privacy in every aspect. They were seriously nicer than my bathroom in my stick house. If I could have rated the restrooms a 10, I totally would have.
My only two negatives: 1) Despite mentioning my GSC membership on the telephone when making my reservation, and being told to "just bring my card with me on check-in, they had already run my credit card prior to my arrival, without the GSC discounted price, and wouldn't budge on this. In fact, I was told, "I needed that number when you called in for your reservation"...which is exactly the opposite of what I was told when making the reservation. 2) Not sure if the section of the park our spot was in was "newer" or not, but there was ZERO grass between the sites, and they were just a hair close (not close enough to slide out and pop out the awning, but still very close). The "pads" were not concrete, they were rough stone, and I would have loved to have stepped out of my camper in the morning with my coffee, barefoot, and had grass on my feet...but sadly, no grass, no trees, no nature...just rocks.
Otherwise, this was a super great resort, lots of staff to take care of all park maintenance/upkeep (supervision), and their new cafe had some really, really tasty eats!