I have a list of tours. I use accordion component to display them as in Coast. When user clicks on Tour A, I show basic description of tour. Within that Basic Description I'd like for user to be able to see a fuller description on Tour A. Can I do this using components or do I need to link to another page and then use Back link to where user came from? It'd be nice if Learn More button or something else within drop-down (expansion) did the job.

You could e.g. put a modal into the accordion panes, and write a fuller description in the modal.