You don't always have to make new travel marketing content from scratch. You can also curate content. Which means you select the best pieces of existing content to share your message and enhances your status as an expert in your niche or proof that the travel experiences you are offering are indeed worth a try.
To curate travel content, you check what kind of content is already online.
There are several ways that can help you with finding content
Follow hashtags of your niche on social media
Follow the leaders and inpiratirs of your niche on social media
Follow industry news & trends in your favorite online magazines
Follow the best blogs around your niche