OK thanks so much. I'm mainly concerned with how using the plugin could affect other parts of my game, since this card game is just a part of it. I think (based on what I read in this article) the plugin uses auto-banking, which should be perfect. This totally opens up some other gaming possibilities that need arrays.
This article was very helpful too:
https://laroldsretrogameyard.com/tutorials/gb/how-to-use-rom-memory-banks/