Given a choice, i'd go for a 16-35, 24-70 and 70-200 with my M7 as my film body. A couple of 1D2s and lots of memory and batts. Oh and at least 2x550ex. Standard press kit for me when i do event coverage. Depending on the nature of the event, i will then add to it accordingly. A laptop is always desirable but if you are going as part of a group, i'm sure someone will have one. Also, i dunno if you should bring a portable Hdd or more CFs really. I'd probably go with the latter since i'm not too comfortable with putting all my eggs in one basket.
Oh, alternatively, get one of those stenowriters that write CF to CDs.