The beam coach needs to be talked to. I would suggest maybe approaching the HC as a parent rather than a board member. If she is as lacking in experience as you suggest, she really has no business coaching at the upper optional level, at least not right now. Non-gymnasts can be great coaches, but they need a foundation in basic skills first. Much like you wouldn't put a beginner gymnast in level 8. If she is the only option, then the gym needs to be mentoring her and giving her lots of direction as to what is appropriate for this skill level. Helping with lesson plans, appropriate drills and progressions, guidance as to what numbers are appropriate. They also need to be doing in gym training, video training, and sending her to as many coaching clinics as possible. The risk of injury is just too high at that skill level to be messing around. And even a coach with the best intentions but lacking experience needs some solid guidance in that scenario.
As for the meets, I am purposely choosing smaller meets for my kids, but they are first year competitors in Xcel. HC wants me to make their first meet one of the mega meets in our state and I am not sure it's the best choice. But for level 9/10s, bigger meets with greater exposure are important. And if you are going to spend the money to travel all that way, it better be a great meet. I have spent hours researching meets for my Xcel Bronze kids, I'm baffled that a HC of an upper level optional team would just pick something so arbitrarily. Especially with how easy it is to get meet results from previous seasons. I guess you can just try to make the best of it. Make it a vacation where you just happen to have a practice meet.