The TIP programs looked fun, shame they were so pricey. I kept getting the invites, but neither me nor anyone I knew had parents who could throw down for it. I do recall doing an excellent forensic science daytime camp program with the law enforcement training program at the community college though. It was only a couple of days long, but the instructor was great and it was a totally unique experience. Making summer programs more accessible and interesting would probably be a great thing for kids of all ability levels to be honest.
I was in TIP and CTY, and I would agree. That was always the best part of the year, and it provided a view into worlds I didn't know existed before. In fifth grade we studied recursion in math and all the kids there were smarter than me. The people were so much more interesting too. Life changing experiences.