Ohhh if you don’t care about time...fly Thursday afternoon, lodge Friday morning, and pick up Monday afternoon...Friday is not busy as most people won’t want to wait until Monday...
Tuesday is also another good day to lodge...not as busy...I got there last week 7.30am and only 20 people in front of me...waited 30 minutes to lodge after opening, and less than 10 minutes to collect
Avoid Monday’s and Thursday as this is when most agencies take groups
Jackie Blue as I said you can use USD and THB in most places...I used THB everywhere
They usually give change in Kip though...just make sure the exchange rate is close...I checked every time I purchased...and only one place tried to rip me off