First, I think that 12 tournaments with half requiring hotel stays is to much for 10u.
Second, here is how I made the schedule for my team. Since we have not won a local tournament, all of our tournaments are within an hour to hour and a half drive. When we win local, we MAY travel farther away, but I will limit it to 2 and half to 3 hour drive. I have parents that WANT to travel and do the hotel stays. We need to win first. I do not want to make families pay to travel, hotels, etc and play 3 games. So, with that being said, I would not take a team to Nationals that did not win locally, and not just win games, but win tournaments.
As far as money returns, I would give refunds if the player gets injured, moves suddenly, needs to stop for something not in their control, or if I ask them to leave. You quit and walk, I would not give a refund, especially if we have already started playing tournaments.
Second, here is how I made the schedule for my team. Since we have not won a local tournament, all of our tournaments are within an hour to hour and a half drive. When we win local, we MAY travel farther away, but I will limit it to 2 and half to 3 hour drive. I have parents that WANT to travel and do the hotel stays. We need to win first. I do not want to make families pay to travel, hotels, etc and play 3 games. So, with that being said, I would not take a team to Nationals that did not win locally, and not just win games, but win tournaments.
As far as money returns, I would give refunds if the player gets injured, moves suddenly, needs to stop for something not in their control, or if I ask them to leave. You quit and walk, I would not give a refund, especially if we have already started playing tournaments.