By the time the body starts adjusting on a 48-hour trip, you are flying home. The middle path is to stay close to home time and borrow only the local cues that matter for the meeting window.
Mark the hours that have to be sharp. Plan the trip so those hours fall during a slot where the home clock is naturally alert.
A solid block at a slightly off-local hour beats a fragmented attempt at "correct" local bedtime. Dark, cool, quiet — non-negotiable.
Outdoor light only during the meeting window. Normal coffee at home-clock morning. Avoid piling on caffeine because of the trip.
Trips longer than 3–4 days, or small enough shifts that adjusting is cheap, flip the math toward a normal adjustment plan.