For good reason I have to avoid carrying heavy camera gear around going forward. It is not just a question of getting old.
For my Architectural photography I use a couple of Z7 or D850 bodies and a set of four heavy shift lenses and a telephoto zoom for details. A rough estimate is that I have been carrying between 6 and 10 kilos over my shoulder, if I include a tripod and other stuff. (Less than I thought.) Thanks to the war on cars, I often have to park outside of the historic centre of the places I visit and the Billingham 550 was getting a bit heavy for an afternoons photography.
Looking around the web for improbable trolleys to put under my Billingham, I came across the Manfrotto Reloader Switch-55 PL Roller, it might be a solution. Basically it is a camera bag with wheels, like my aircraft carry on case. It can also be used as a rucksack, or just carried. It arrived from Holland today (€200 cheaper than Italy!). Hopefully I have kicked the camera weight problem can down the road for a good while.
Another camera bag joins the collection.