I finally did a quick trial camping trip on a motorcycle with my wife after a while of thinking about it. It was only did a one nighter to San Juan Island that was relatively close to home in case there were complications. My two main impressions:

1: Motocamping would be easier with only one person's gear to pack. I didn't plan on taking any food as there were plenty of options in town and a store to pick things up if needed after the camp was setup to make room in the cases. I wouldn't have had any room to pack provisions anyway.
2: Better for trips where the ride is the emphasis with the destination at the end to setup camp and stay put until the next day's ride. I didn't want to sit at the site, so we went to see the English and American Camps and to a little hiking. It is a little bit of a hassle having to don and doff all the gear to do anything. Plus I don't really trust people anymore, so leaving gear around the bike that I can't lock is uneasy for me.

I could see motocamping being really fun with a group of riders, not that we didn't enjoy ourselves, but we'll stick to car camping if together or have a bunch of different stops to check out.

It is hard to do two up touring and camping if you have bulky gear and a better half who needs a whole pannier for her stuff. I can carry: a smaller tent, good quality sl bags that stuff down real small, backpacking stove and nesting cooking gear, dehydrated food, water, smallish air-mattresses, clothes for two days, toiletries etc all inside my 102 liters of storage space. Plus first aid kit, air compressor, toolkit, etc. I am sure there are folks on this forum with a lot of 2 up touring experience, I would like to hear how they do it for more than a few days at a time or without strapping a bunch of stuff to the tops of their panniers. As far as securing your riding gear when out on a hike or when you will be away for a long time in a sketchy place, I use a bicycle style cable lock from Walmart... loop it through my helmet chinbar, jacket sleeve, pants leg, and the grab bar on the bike. If you need to strap stuff that can't be secured just make sure it is something not vital... like dirty clothes or rain gear or ?

The biggest problem for me camping two up is space for beer! End up making another trip back out to the store...

Being an experienced backpacker was a big help for me.
As far as not trusting people, I'm the same way. I carry a coated steel cable & padlock to lock my helmet ( only works on full face) & riding suit to the bike. Then I throw a 1/2 cover over the bike.

I carry wire cutters. :biggrinjester:

To be fair to my wife, she did manage to stay within the limits that I imposed on packing, which is probably also why a one nighter was not such bad idea. We stayed at San Juan County Park and they don't have showers and I could tell it was bugging her a bit, but she was a good sport.

Here is what we packed.

Top case (Kappa K49) - Two sleeping bags, two compressible pillows, and tent footprint.

Side cases (Storm cases from Caribou - offset package for SW rack) - Halulite Microdualist with one can of fuel and stove nestled inside. GSI coffee press with coffee and powdered creamer stored inside. Two Big Agnes Insulated Aircore pads, REI Halfdome 2 tent, toiletries, shoes, one change of clothes each.

Tank bag - Sunglasses, head lamps, papers, phones, wallet, travel purse, camera, and jacket liner.

I only ride solo since mrs. dhally isn't interested. I've tried bike camping a couple of times and found that I miss my creature comforts - a comfortable chair, someone else to do the cooking and cleanup, a shower, and of course cold beer. So I generally carry a tarp and sleeping bag for emergencies, and then stay indoors.

Momma has to have a shower for more than 1 night trip. We ride in hiking boots to avoid bringing another pair of shoes. Your list looks about like mine, except I swap out an esbit stove for a MSR Int'l when space is tight. Maybe my side cases are a bit bigger but your top case is bigger than mine.

It's all good.

I'll just enjoy the one night I get to bike camp with the gf. Then it's back to solo camping for me as well. I found myself thinking I should've left the lock and cable at home when I was in Canada and Alaska. I frequently left my gear in the tent to go for a walk in town or just strapped it on the bike. Just the same, I took the keys and money with me. :mrgreen:

Careful. You might run into that guy with the wire cutters.

Lol, I meant bringing my lock and cable was a waste of space since I didn't use them. There were a few times I inadvertently left the luggage keys in the locks overnight. I'd go eat at restaurants in various towns while I left my tank bag on with the gps and helmet resting on the mirror. Nobody messed with my stuff. I think travel in North America is similar to South America... only really have to worry when you get in the big cities.