storing separate photos on my iPad

iOS & iPadOS

So I have a lot of photos on my iPad and am using iCloud where they all are, but I am traveling and need to store some on my phone because I am using Melodist, an app that makes music of photos, wich basically means that I need them on my iPad. I have no wifi on most of my travels. I will soon go to Norway and there is no wifi on the place where I am. I assume I may actually be able to use my phone as hotspot though.