Safari - Easter weekend (Dar es Salaam)

Hi,

I'd like to go on safari during the eastern weekend. (Friday 29 march - Monday 1st april).
I have been contacting various organizations. But since I am alone, the price they ask is way over my budget.

Is anyone interested in joining me? (This will reduce the costs)
OR i'll just go by bus. Any recommendations?
I was thinking about Scandinavia Express. But I have been told that they don't exist anymore. (Can somebody confirm?)

Thomas