Hibernia is indeed cliquey. I have been playing hib for as long as I can remember, and if I'm remembering right, it has always been this way. Coming from an RP cluster myself, I happen to know a lot of people playing Hib atm. So finding groups for me has never been an issue, but I know that is not everyone's experience. It really is hard to explain, but I just think a lot hibs have a lot of loyalty (not saying the other realms don't) from their roots.
I myself have been with the same guild from 9 years ago on Guinevere. And have stayed together with a lot of the people from our alliance for those same 9 years.
Recently, the alliance decided to merge the guilds and get into an alliance that is more RvR friendly.
If you are playing hib, and need a guild, send a tell to someone in The Faithful Few. The alliance is very RvR-centric and our guild RvR's practically every night from 7-9pm EST. We have a few people you might recognize if you played on the RP servers/cluster, Docsheal, Maxbuffwell, Vanyael, Kedehern, Meme, and Larian (if you still have an old ratty prima daoc guide, look at the page in the back of the book

) Like I said we have a few of the old folks from rp servers.
Can contact me on Cardennale or message on the boards if you want to join up. We aren't elitests, so joining up and running with us in RvR is pretty much guaranteed, granted we have the room, but always welcome to piggyback.
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Veteran DAoCer
Survivor of Guinevere
Mostly known as "Card"