Ideas for creating an “index” or “archive” for multiple blogs

I’ve been blogging (mostly about travel) for 10+ years and stupidly started with a blog for each trip or stage of my life. The idea of consolidating my blogs into my main one (raecrothers.ca/blog) is very daunting and would be really time consuming. I thought of creating an index on one page that would link to my myriads of blogs that would work something like Categories with subcategories. Eg.

North America –> Mexico –> Yucatan –> Merida –> Restaurants
North American –> Canada –> Yukon –> Dawson City –> Museums
Europe –> Bulgaria –> Sofia –> Walking Tours

The point for all of this is that I get new readers all the time who want to go back and read about my adventures in such and such a place or I want to more easily compile a list of all the different sushi restaurants I’ve been to or I want to be able at nearly a glance to remember what date I was in a certain area.

I started to do it as just a regular page, manually linking to all my posts, but I have so many destinations and thousands of posts that it’s really unwieldy and not particularly user friendly. At this point, all I can see to do is export and import of all those older blogs to my raecrothers.ca/blog and get to work categorizing, but I’m wondering if someone can envision a better way? I don’t mind doing the data entry; it’s the reuploading photos that’s tedious to me. Perhaps someone has designed a page template that does something similar?

Any input would be appreciated. I’m reasonably WP savvy.

Thanks,

Rae