Hello Tim,
Nice to hear you and that you are interested in Finnish amateur gathering.
The Finnish radioamateur league, (Suomen RadioAmatööri Liitto=) SRAL is having twice a year a short convention, normally one or two days.
This happens normally at spring around april - may time (this so called "spring" convention). Another is so called "autum" convention normally at November.
SRAL had just last week (19th of Nov.) latest convention in town called Huittinen. About 250 visitors visited place and around 150 persons registered them selves.
In these conventions there are typically lectures, fleamarket and official league meeting and ofcourse face to face qsos
BUT, the biggest Convention is called SRAL summer camp! Summer camp is the best place to meet people. Normally around 1000+ hams meet there(in Finland we have about 6000 hams). Summer camp is held typically around the middle of the July, the best time in Finland since the summer is the best at that time! See from the Finnish magazine "Radioamatööri" the next summer camp info. In finnish it is called "SRAL ry kesäleiri". Also more information can be found from SRAL´s home pages :http://www.sral.fi/en/ and that is in english....
Summer camp has also lectures about interested issues (new tecnologies, contest, DXing, training and working), fleamarket (ofcourse), BBQ, sitting and chatting next to the fireplace, and ofcourse some crazy things (like last summer camp a group of VHF UHF SHF hams brought a mobile EME station with dia 4,5m mobile dish antenna and had qsos ofcourse...)
73 de Heikki OH2LH