My older boy (he's 12 and in 7th grade, will be 13 in July so he's really young for his grade) has done 3 camps. Summer 2021 was a day camp due to them not getting the OK for overnights (covid BS) in time, summer 2022 was overnight (stayed in Callaway House), and then a day camp this past December. My younger boy did a "Hitting Under the Lights" camp this past December the Friday night before my older one did his Saturday/Sunday day camp.
In all of these camps they do get a lot of instruction though it can vary depending on how many kids are in each camp. And when they scrimmage the competition level can vary because there will be some high-level kids and some other kids who look like they've never played baseball before.
You can also pay a little extra for them to do video analysis/review of their hitting & pitching which we've found helpful because we shared with their coaches as stuff to work on or emphasize.
They didn't do it at the hitting camp but at the full camps they do full reviews and rate kids from a 1-5. Basically the same scale as a recruiting service where a 5 is a young Bryce Harper or Shohei Ohtani and a 1 is probably not making the HS team (depending on age).
I know both boys absolutely loved the camps with the instruction, the competition, and just the cool experience of getting to play on Olsen. Plus, and this is more important for the older boy as he approaches HS, you get a lot of instruction on the mental side and mentality the coaches want plus being told, "if you want to play at this level this is what you have to do to get here." And while it's definitely way too early since my older boy hasn't really hit puberty yet but the coaches do start recruiting kids out of these camps.