We’re also in NoVa and my now college senior rowed for both his HS team and his club team (club fall and summer, HS team for winter conditioning and Spring). This was the right fit for him because he really gelled with the guys on the HS team and wanted to compete with them in the spring. (Plus in terms of coaching, it was a lot of the same coaches - back then a lot of our HS coaches coached for TBC, which was his club, so not a big difference. Things have changed now that OAR is up and running and there seem to be more clubs available.)
I don’t think which team your son rows on will actually make a big difference - mens rowing is more challenging to be recruited for than women’s, there simply aren’t as many schools that have it as an official (and not club) sport. He may need to do some initial outreach to the coaches he’s interested in, regardless of which team he rows on. And when he does that, the first thing they are going to ask is what’s his 2K time. That truly seemed to matter more during our recruiting go round than overall boat performance. Unlike other sports, they didn’t want video of his races or anything, just what’s your 2k, how tall are you. (Stellar 2K time for my guy was great, being only 5’11” was not.)
We had boys from our HS team - just his senior year - recruited by Penn, Princeton, MIT, Harvard, Cornell, Cal, Wisconsin, Williams, Colby, Tufts and the Naval Academy. My son, a little on the short side and wanting a STEM school, was recruited at Lehigh and WPI. This year I know two girls who got recruited - one to cox at UW and one to row at UCONN. All of these kids did the same model - club for summers and fall, HS for winter conditioning and spring. So if he wants to be on the HS team, I think that’s perfectly fine.
Like someone above said, the thing that will be most challenging is that so many of the really strong programs are at schools that have extremely high academic standards - so if all else is equal, I’d suggest picking whatever makes school work easier or less stressful. Like, for us the seasons with the club team were really challenging because we had to provide transport to the water which was challenging to work in to our schedule. The HS team has a bus that goes from school to the water and back and he had guys on the bus in the same classes, so when they were cramming or had big assignments, they could study together while killing time at regattas and when it was time for things like AP exams, the coaches were more understanding because half or more of the boat was affected.
So all this to say - I don’t think there really is a wrong choice, as long as he’s happy, feels like he’s growing and having a good experience, and you can fit it into the other demands of your life. Good luck!