This is a good idea. The organization/travel team that my son plays for offers hitting/pitching/catching clinics as well as options to play on a winter league "house" team, both of which are open to anyone, without trying out or joining the travel team. A lot of the travel team kids do the hitting/pitching/catching clinics but also have a separate team practice/skills development time, which is not open to others.
For our travel teams, the tryouts for next year's team already occurred (they happen in late Aug/early Sept). Team activities will start in Nov with indoor practices and leagues through the winter (if Covid allows that this year) and then move outside in the spring. They start outdoor tournaments in late spring and those run through July/early Aug.
Around here, most younger players that do travel, play rec as well so that they are eligible for "All Stars" and the tournaments that lead into the Little League World Series. The travel teams take that into account and reduce their schedules during the rec Little League season.