My daughter is a goalie and often guests for tournaments. It helps that her clubs b and c teams don’t have girls who want to play goalie. She loves it and usually sees more action than in a game with her team. She also sees a lot of the same goalies on other teams that she plays during her regular season, so her club isn’t the only one getting goalies extra reps

With our club, the coaches would recommend/seek a player most at the level of the lower team (ability or even age) - they won't bring down a ringer because of fairness issues.

My kid did this. He was AA asked to play in an B tournament. Had an amazing weekend and he helped them win the tournament. He's actually still friends with the kids he met during that tournament.