Last night, a Thursday, WOOK had 40 players online. Two raid groups and two or three pvp groups in addition to players leveling and socializing. Your assumptions about how other guilds are organized and running are a little off base, at least in our case. Nothing leads me to believe we are looking to change the way we operate. Thanks for the concern though... I guess.
This is the main issue that Jakees should be concerned with. If you are in a guild that has 5 active players on at any given time your guild should not be doing the absorbing, but rather should be absorbed by a larger, more active guild. The guild I was in had a single 8 man team, we merged with WOOK before F2P, and have been having much more opportunities for fun since. All it really took was for us to realize that our tight-knit, launch guild would benefit from the resources of a larger player-base. We left some alts in our original guild, but are all really happy to have moved. My suggestion is to find a larger guild that is up for a merger and move single characters at first to test the waters.
All that aside, to join WOOK you need a member to sponsor you currently. As far as I know we are not actively seeking mergers. If you'd like to contact any of us directly try http://www.wookieeroar.com/. Want to know if there is room in one of our PVP premades or need a player to fill an empty spot in your group? Send one of us a tell, most of us are pretty helpful and easy to get along with. Good luck and have fun!