Welcome fellow painted one(s)!
Of possible backstory interest and/or motivations for coming to Anvil, Broceliande was recently subject to a year-long assault by the eternal, Yaw’nagrah and it’s mortal followers that stirred up the vallorn to attack the entire territory. Most all of the Empire’s nations directly assisted Navarr in holding onto the regions we control. So did some Druj, which made a lot of people unhappy and your steading may have heard about. The imperial victory has involved laying a 30-year curse across all Broceliande, which has angered some steadings and caused them to at least consider leaving the territory.
Currently there is a grand expedition/adventure going on into the heart of Broceliande, trying to reach the ruins of Terunael city. While being a part of the expedition itself required joining a specific downtime action after the last event, your group could claim to have been involved in supporting the organising stages, or be attending Anvil in part to find out what has been discovered or (especially for artisans) retrieved.
With Dawn being of interest to some of your group, backstory links to Greenstead in the Boar’s Dell region of Broceliande might work - it’s a steading with strong links to and a history of inter-marriage with Dawn. Plus Boar’s Dell borders the Barrens to boot. As far as I’m aware, Greenstead is an NPC steading created by PD rather than players but if any of your group use Facebook then it would be worth joining the group, Empire LRP: Navarr and asking if anyone knows of Greenstead player characters. It’s also a good place to find other PCs willing to have backstory links with your group. Don’t be shy about approaching the Empire LRP: Dawn group either for cross-nation links, as they give you people to visit when you reach the field.
Pure tourism is a valid reason to go visiting any nation; Anvil is the only place where all ten nations (or nine-correction-ten if a character has trouble remembering to include the Imperial Orcs) gather reliably, so is a person’s best chance to glimpse the wider Empire. I think Wintermark, Highguard and possibly the League have major festivals going on at the first event of 2023 if you decide to attend that one, but asking every nation if they have one that summit gives you a topic of conversation as you tour Anvil. Navarr waits for better weather and celebrates Spring with the Welcoming at the 2nd event each real-world year.
There is an Artisans’ Guild at Anvil that is a cross-nation sodality, good for rp with any nation. Trading your wares or for resources is another good reason to visit all of Anvil, so don’t feel that you group needs to have a source of every crafting material among you - aiming for self-sufficiency can become a trap I’ve seen ttrpg groups (mine included) fall into.
If you’re interested in becoming a Vate, it is perfectly possible to join a Coven outside of your steading or striding (which is most often made as a Banner for games-mechanics purposes); your character just won’t see much of their fellow ritualists outide of Anvil summits. There is also a magic item called the Volhov’s Robe that allows a ritualist to support a coven’s casting without joining it.
Hope some of this is useful, and welcome to Navarr!