Prompts are just for inspiration. You don't have to submit to prompts. Yes, it could be a travelogue. You retain copyright. I wouldn't dream of assuming anything else. The important thing to me is that you own the copyright.
You can use your photos anywhere you like. They are your pics. :)
Ask away!
I’m not after anything too long. This is not the place for 7 minute stories. It’s all about the photos, with a short explanation for each shot.
Take a look at the other stories I've moved into the publication if you want to see some of the sorts of things that could work.