I'm not a fan of going into Dry Top solo, and it took me FOREVER to farm geodes for Mawdry recipes and clay. But this post from [DTOP] caught my eye yesterday and I decided to check it out:
http://www.reddit.com/r/Guildwars2/comments/31c8uq/dtop_6hrs_of_t6_dry_top_easter_special/
It was really good. [DTOP] is an event guild specifically for farming Dry Top. They got the map Tier 6 (which mean much cheaper prices for anything purchased with geodes). Not once, but several times in a row.
Coordination was in TS, and just like [SORC] it was patient, friendly and PG rated. I had a lot of fun and walked away after 2 hrs with 50 bricks of clay, 200 spare geodes and several new achievos. Two thumbs up!
So if you need geode and cheap Dry Top prices watch for [DTOP] taxis on Friday/Saturday evenings. They mentioned they are taking a week off, with the next event scheduled for April 17th.
~Shmi