Re: transporting packages
For 800 miles I would transport in a van, even if you had to rent one. I move 550 packages at a time on an open trailer almost 1000 miles.
5 kw genset
Load tarps and nets. (If it rains the tarps go on, the nets provide shade from the beating sun while still down south)
enough power tools to build a house
2 full size spare tires for the tow vehicle and 8 spares for the trailer.
Mechanics tool kit, including impact wrench set, air comp, jack, flares.
I change all the fluids in the tow vehicle before I go as well as all fan belts, test alt, and visually inspect water pump.
If you are going to break down it will happen late at night in the middle of know where. Last year I snapped an axle at 4 am and had to wait until 7am for a repair truck to show up. Out comes the generator, fans, and water sprayers.... Then he had to wait until 9 am for the parts store to open, then it took 3 hrs to fix. Sitting on the side of the highway for 8 hrs with bees on board can be very stressful. Basically think of everything that can go wrong and prepare as best you can.
Always question Conventional Wisdom.