I would say all clans had a chance to be in the camps. But some more than others.
Orcs were continuously captured and carted in cages into the camps throughout the time of their function.
So any orc at large would have a chance of being captured INCLUDING Bleeding Hollow who were among orcs captured.
Mistakes happen, and the Warsong clan continued to raid and attack certain places and by doing so could of resulted in a few orc being left behind and captured. Orgrim of the Blackrock Clan himself, was an oddity kept by King Terenas.
My biggest advice would be, look up EACH clan. Check their status if they are active or not, and read about their involvements in the 2nd war , what became of them and maybe look for information on their involvement with Thrall or being in camps.
Shadowmoon Clan is labeled as non-existent now due to Ner’zhul and Gul’dan. Most of them fell to darkness and became Warlocks. But that doesn’t mean they do not exist anymore as individuals, or that -former- Shadowmoon were not captured. Many Shadowmoon became something else, and in their time of aging could be seeking to revive their lost traditions, or perhaps born of parents who were Shadowmoon and seek the old ways that were lost to fel, and wish to return to the ancient shamanic mysticism an star gazing.
You could of been a young Frostwolf Orc, who didn’t head the warning of their parents and traveled too far from home, became lost and stumbled in the wrong place in the wrong time, captured as one of the rare few Frostwolves. This would be -very- rare, considering Frostwolves kept completely to themselves to the point of starvation. But small things like this are not impossible, its all about how much you think about the realistic components of what each clan went through and what happened to them.
Clans that have a very close to 0 change of showing up are clans like Whiteclaw, Thunderlord, Redwalker ect due to that most of these were little to wiped out around this time. But of course, enjoy the journey of research and immersive yourself in the lore. I highly recommend finding the books that make up the Chronicles of War megabook and then reading Lord of the Clans. All of these are very important books that make up things from the orcs, through the first war and second wars and Lord of the Clans being Thralls escape and reuniting.
I will say, none of them would be Mag’har of course, because the first Mag’har did not walk among the orc until Garrosh, and no one had seen what became of the Garadar orcs until that time (of Burning Crusade).
Lastly, I love the avenue of you having an orc seeking their heritage. This is a very realistic thing for them to do as a person who feels disconnected from their culture. It’s something I 100% relate too, and I wish more people thought this way.
Traditions and culture were warped due to their manipulation of fel, demons and warlocks. But that does not mean it has disappeared, and it does not mean it’s not a thing anymore. Many will try and go on that clan identity is not a thing anymore, or that clans in general do not exist or traditions are not cared about. This is untrue, and when you think about orcs as a people, is impossible. The orcs -lost- what was theirs. The orcs wept and felt a sense of revival once they were freed and united with the Tauren, finding their sense of culture again. They , under Thrall, found traditions again. And even though there are not separate clans like there were on Draenor, where the traditions are celebrated in isolated groups, but now they are celebrated in families where the family and individuals and seek out like minded orcs of their background and further traditions.
It’s this beautiful sense of finding their way in a new world where their identites were stripped from them with promise of something better, but now they CAN be who they were, just different.
The Warsong Clan is highly an active and functional clan still with an actual orc who represents them. The Shattered Hand are protectors of the Horde, actively recruit still and are important to the protection of their people. The Dragonmaw still thrive in the Twilight Highlands and the Frostwolf Clan still much of their traditions still live in Alterac Valley. The Blackrock Clan , while with no identifiable leader, is still considered active by name and due to the nature of the Horde are likely grasping for a revival of lost culture.
It’s a beautiful journey, and I hope you have fun. The Horde is a new world, where orcs are trying to return to a sense of cultural identity while also living amonst a melting pot of other orcs no longer a singular clan. The search for lost friends, relatives and connections and history are things that must be done now…all the while walking a modern life where clan identity looks a little different now.
Can’t wait to hear what you do (And don’t worry, this isnt an awkward question and never feel scared to seek advice and help!)