They've just started year-round contact in Florida in the last couple of years, although they managed to work around it in years past. Our personal experience has been positive. Our summer HS program has been very relaxed and fun and takes place during the week, while the summer travel team is intense and competitive and, except for the big tournaments, takes place mostly on weekends. Our HS coaches have been supportive of participation on competitive summer teams, and we have been doing both. If 2B was a pitcher, it might be different, but the way my player sees it, the more ABs and the more game experience he can get, the better.
However, I have heard of two local HS coaches who are attempting to bully (my opinion) their players into playing only for the HS summer team. The threat is that summer HS ball is a tryout for varsity next year. Rumor has it that players with summer commitments to other sports are exempt, but the HS coaches don't want the baseball-only players being coached by anyone else. I wouldn't like being in that situation.
Edit: the way I understand the FHSAA rules, contact is OK, but mandating participation in summer ball is not. Someone will correct me if this isn't the case.