Please, no suitcases - find a good size duffel and all this will fit in. One duffel is all you should need. You can use your day pack as carry-on luggage.
The list below includes what I think is a reasonable amount of clothing. Mostly we will be in shorts and t-shirts. "Good" clothes are not needed. But, rain gear may be desirable.
We will get all our food at restaurants, except for breakfasts at HVNP. We will do lots of food shopping as we travel around. To keep food and beverages cold and fresh, we will purchase some cheap styrofoam coolers.
We will be in hotels most of the time. While at HVNP, we will be in "rustic" cabins. They have beds and mattresses but not much else. We will make our own breakfast there - I will bring the needed pot and stove to heat water.
Expect temperatures to be 65o (low) to 80o (high) almost all the time except on mountain tops.
READ THIS ==> To get through airports and borders: You must have a photo id AND you should not have anything that could be considered a weapon by anyone under any circumstances. NOTHING SHARP. No nail clippers, no rock hammers, no pocket knife, no uzis. And, no white powders. Lap tops and camera equipment cause all sorts of problems too - but we may have to deal with that.
don't leave home without it
small day pack
sleeping bag good to 50o
2 shorts (will wear most of time)
4 t-shirts (will wear most of time)
long sleeve shirt
sweater (for mountain tops)
toothbrush, shampoo, etc.
money, plastic, etc. (food could be $20/day or more.)
bowl, spoon, cup (for breakfast)
3-ring binder for guidebook pages, pen(s)
flashlight (needed for night hike!)
rock hammer/pick (pack into checked baggage)
hand lens !
winter jacket (for traveling to Wpg)
book to read
empty pillow case (to stuff for pillow)
pocket knife (pack into checked baggage)
kleenix (can double for T.P.)
mechanical pencils (3 or 4)
collection bags (zip-lock or other)