The amount of time it takes you to perform a task the "night before" is still time spent/invested in the task.
IOW, if I do this now...Saturday night and we are pulling out Sunday morning. The time is spent on Saturday would have been spent on Sunday.
1. Have a plan, in writing.
2. Execute the plan.
3. Delegating...if you are not alone. The first time I noticed how long it took was when I was camping alone with two dogs on an overnight stop and I saw the other "overnighters" breaking down and moving away much faster.
4. Modify the plan...if necessary.