Everyone needs see the results of a site visit. What's the best format? As a designer I like to apply what I learned immediately to pre-visit concepts and make them more real so that I will have time to validate and iterate. But the team needs to understand what you did, who you saw, and why this new perspective is more accurate then their previous view of the world.
So a trip report has to include:
--Who you visited
--What you observed
--How the process observed modifies current flow
--How the procedures and language modifies current terminology, field labels and options.
--How the design, screens and hardware should be modified to reflect this new understanding.