I need a better way to do this.
Currently, I have added code directly to the get_price_string function within class-wc-subscriptions-product.php file, so when a free trial is setup I can change the text being added to the price string.
This, of course, is far from perfect.
So, does anyone know what hook I need to add to the functions.php file in the theme's folder to be able to do the same thing?