Hello rlb78 - welcome to our forum!
Whether or not it would be considered travel writing depends primarily upon one thing - is the destination (or destinations as the case may be) the focus of the book, such that the story is mostly about the place? Or is the experience(s) you had the focus? If it's the former, then it would be considered travel writing. If it's the latter, then it likely would not, unless you still wove in enough place information that your experiences would not have happened elsewhere.
If you don't mind a suggestion, since it sounds like you haven't yet started writing the book, you might consider learning more about the history and culture of the places you visited, and find ways to work them into your story - it would enrich your book with details that the readers would likely appreciate.
And there's nothing wrong with having an insanely long bucket list!
I'd love to hear how your book project turns out - please come back and post an update sometime.