Here's my packing list. The Ducati has 2 large side cases and a top case. I've found that to be more than enough room for everything, so no backpack. I usually do some pretty long days, so I don't want the fatigue that comes with wearing a backpack. But I do bring a small, light backpack for walking around in the evenings and can carry some extra things on my back in a pinch. I also bring a medium sized, thin nylon duffel bag that can be stuffed with large volume things and bungied/strapped to the back seat. When it gets really hot, I take off my crash suit and carry it that way.
The Honda SH350i has a lot less storage capacity, just a small top box and under seat volume, so I'm probably going to have that duffel behind me after we part ways and can't use some of the Ducati volume ;-)
Paperwork: * passport * euro cash * IDL file on phone * Covid vaccine card on phone * pictures of passport, driver's license, on phone * one paperback book to read On the bike: * tool kit, compressor, and tire plug kit * mount for Galaxy Tab 7 (I use this for offline maps) * phone mount (I use this for Google maps) * USB power on the bike (to run the Tablet and phone) * 2 straps * bungee net * giant-loop duffel bag that can be tied on the seat behind me * Cable lock so I can leave my helmet on the bike for a little while * Clear face shield (in case the day gets too long) * small, light day backpack * small can of chain lube Crash gear: * Aerostich suit * Helmet * Boots (wear on the plane) * Ear plugs (several sets) * Elkskin Gloves (regular) * Elkskin gauntlet gloves (cold weather) * Rain gear * glove covers * Boot covers * Rain pants * Rain jacket/ windbreaker (large enough to wear over aerostich) Clothing: * socks and underwear for 7 days (assume wash in hotel sink within 1 week) * bathing trunks * 2 T-shirts short sleeve + 1 T-shirt long sleeve * jeans 1 pair (wear on the plane along with one of those T-shirts) * shorts 1 pair for walking around town * light walking shoes Cold gear: * Warm zip-over pants * Fleece sweater 1 * Puffy vest * Long wool socks x2 * 32° under pants and shirt set * long sleeve T-shirt Toiletries bag: * toothbrush, tooth paste, small shampoo * bite guard * hair brush * ziploc bag of emergency toilet paper * ziploc bag of laundry detergent * clothesline and clips * USB charger for toothbrush Med kit: * aspirin * allergy meds (sudafed) * anti diarrheal * cough suppressant Electronics: * extension cord with socket multiplexor and USB ports * EU plug adapter * small laptop, charger, wireless mouse * USB A-C cables x 2 * wireless charger * USB power pack * prep OSMAnd with maps of planned route On the plane, leave with Mototouring.IT: * big duffle bag * wireless headphones * travel pillow * eye mask * compression socks