Obviously, there are numerous ways to pack up your new Classic. Here's what we do.
Interior: We try to put heavier items in the lower drawers, and light objects in upper cabinets. We put pots and pans in the drawers under the dinette seats. Canned items in lower pantry shelves, and drawer under lounge. We carry lots of cloth hand towels and layer them between breakable plates and around breakable glasses, etc. We use plenty of tupperware, and also place them between other breakable objects. Refrigerater and pantry - separate each glass container with a nonbreakable container.
We keep a small shoe rack just inside the front door, remove shoes there so we dont track dirt/leaves/etc through the cabin. I also keep a pair of flip-flops outside by the steps so I can conveniently go in and out as needed. We also keep a small hand whisk broom just inside the door.
We have a collapsible nylon dog crate that we use for temporary storage while on the road. We put the Keurig coffee pot in there, gallon water bottles, dehumidier, and other heavier odds and ends that we dont want flying around while underway. When we arrive at our destination, we put them back on the counters/ table, fold up the crate and store it in our truck. We typically need to shift some weight to the front to bring tongue weight up to at least 10%, so the crate often contains heavier items, and is placed in front and center of the lounge.
The wardrobe closet and overbed storage bins contain clothes, spare towels, spare sheets and similar personal items. Nothing special here.
Exterior: i use the rear bumper storage for items that can get wet/dirty e.g., for sewer connectors, gray hose (for flushing black water tank), and the like. Our rear storage bin contains 3 plastic storage boxes - one for electrical cables and connectors, one for water hoses/filters/connectors, and one for misc stuff. One of these sits in the lower compartment and the others above it.
We have the twin bed model with exterior storage bins on each side aft of the wheels - I understand the double bed model does not have these side bins. On the streetside bin goes our BBQ supplies/tools, awning pole tool (provided), stabilizer crank tool (provided), Atwood jack tool (which I bought on Amazon) and a support for the sewer hose.
In the curbside bin, I keep 2 folding deck chairs, a rolled up 10 x 20 ground cloth with tent stakes, and misc small outdoor items. There's a very small flip down storage bin under the large curbside bin - I keep a grease gun wrapped in an old towel there to lube our WD equipment and hitch.
In general. I try to prevent heavy and or breakable items from having too much room to move around both horizontally and vertically. Pad them with other softer items to prevent them from breaking, and to prevent them from denting, scratching or cracking parts of your Airstream - such as plastic pipes.
This setup works for us but I'm sure there are hundreds of other ways to pack that might suit you better. I hope you picked up a few useful ideas, but have a great time discovering what works for you....Now go camping!!!