nice map!
the ST-E2 or some wireless manual remote triggers would do the trick
or the latest Yungnuo offering
Phil V said:No!
not like on your 600d - which had a built in transmitter, the 5d II doesn't have one. he Canon ST E2 will do the same job (there's a Yongnuo copy) or mount a flashgun with a transmitter built in.
Or take the opportunity and upgrade to radio triggers.
What flashgun has a transmitter in it?