That’s around where I was figuring since, in the manga/anime, that’s around where I believe the crew is age wise.
As for the questions…
1-I wasn’t planning it but I’m not against it. I’m thinking he’d have a few of Luffy’s quirks but be more scholarly in a way. He spent a lot of time talking to Robin and stuff.
2-I think we should.
3-Mm I can think of two options. Option A: things have gotten so that the crew and the reps of the Fleet have some sort of meeting on like Amazon Lilly, the Baratie or one of the islands in the East Blue. The kids then sneak away.
Option B: Theres no meeting and the kids still sneak away BUT they all meet up somewhere they’d agreed to once they were all old enough.
I can just see their parent’s reactions now lol.