You have a choice of sponsors for the mission, each offering different advantages and disadvantages. Though it is rated as "Very Easy", I have chosen the International Mars Mission. This does give the best chance of success. I may run another mission later with a different sponsor.
The IMM provides $30,000M of funding which will be used for supplies, pre-fab buildings and research. It also provides additional research points at a rate of 300 per Sol which will be most beneficial. Research is the key to success and survival. The IMM will have 200 applicants for us to chose from for our colonists. The IMM will also provide food stocks with the colonists.