artemis

Hi, i am a Skydiver in Austria with 230 jumps. I got the opportunity to jump out of a hot air ballon next week, so i am wandering how to prepare for such a jump. Can anyone tell me what i have to take into account, or are there any additional dangers? I already have a friend somewhere on the ground pointing out the wind direction and picking me up. Is there a reason why i should not turn on my cypres on a ballon jump? thx Artemis