Post History

Always a good idea to state major details once, and never again.

How you are going to present the details is up to you. Which characters matter more? Which ones are not a major part of the plan? What are the possible complications? Your PoV character is going to be telling all this, so keep it constrained to his point of view so you can surprise the reader later. Keep it within the narrative limits of your story, however.

Modify the amount of data you are giving to the reader, and use unreliable narration to your advantage. That way, you can keep suspense without diluting your plot.