TravCraft, short for Travelling Minecraft, is a nomadic style Minecraft experience focused around travelling and exploration with all new biome generation and lots of structures to explore and loot.
The most important mod in the pack is the Nomadic Tents mod by skyjay1, using this Mod you're able to build tardis like tents that you can pick up and place anywhere in the world whilst the inside of the tent remains as it was before being picked up.
As already mentioned, TravCraft focusses around exploration and if you'd have to return to a set location, your base, every time you go out, eventually finding new things is going to take longer and longer, TravCraft aims to fix that issue by having your base be moving with you.
The modpack also includes magic and RPG elements such as with the Ars Nouveau mod by baileyholl2 and Gootastic, allowing you to create your own spells and automate things using magic.
Or, if magic isn't for you, the pack includes Immersive Engineering by BluSunrize, a realism inspired tech mod adding things such as powerlines, Multiblock structures and much more.
Most mods in the TravCraft modpack exist to enhance the atmosphere of travelling or being in your tent, there are tons of decoration mods and tons of mods that enhance terrain generation.