You can find some info about us here. Mostly, it's on Discord and out Battlenet Social group. We have many people who raid with us regularly, that are not necessarily in our guild. We group, hangout, do achievements, with guildies and without. Some people have decided to transfer toons to the server we're on, some not. So long as you wish to hang out regularly, you can be part of our group.
Although it may show that we do not have AOTC as a guild (we don't, 'cause not all the raiders are guildies), the people who raid with us, do have AOTC. And we get it with each expansion.