Hello Di
I think you mean our departure on 23 March. If so, 24 people have booked so far.
You can take one piece of hold luggage with you, which should be 20kg at the most. If I was going, I would pack the soft-sided holdall inside my main luggage and separate my things on arrival in Mombasa. That way you can take hand luggage on to the plane too. But if your holdall is small enough to count as hand luggage, you could do it that way too.
I would take Kenyan Shillings. If you can't get them in advance, you will be able to change some when you get to Kenya.
As for what to wear, it really is up to you. It's likely to be quite hot, so I would dress for comfort more than anything.
Kind regards,
Olly, your editor