It's frustrating to read that your ideas and those of your group weren't taken seriously, especially considering the time and effort that went into the day. Strategic planning, when well executed, can be a powerful tool, I use it in my business and it generally works well. But in this case, it seems to have missed the mark.
I'm sure you can make things happen because I'm sure you have some great ideas!
How do you think a day like this could be more productive in the future? Or how could everyone's ideas and contributions be better integrated and respected?