Before they started putting wheels on luggage, they sold small fold up carts with two wheels to carry your luggage. I traveled a lot for work in the 1980s and used one quite a bit, I also used the same cart this past week to haul a big box into the shipping company. They are in less demand now so they are harder to find, but are still made for people that fly around the country that have to host convention booths, etc. But I have no idea if it would be very easy to stack four panniers and a handlebar bag on them, that might not work so well. I am sure you could find them in a travel store or for sale in an airport.

Kayaks have small hatches and you can't carry large packs or stuff sacks in a kayak. When I go kayak touring and have lots of small items packed in my kayak, I carry a huge mesh duffel that I can put a bunch of the small items into and then carry that duffel with a shoulder strap up to the campsite.

Mesh folds down very small and is very light. I have not tried to put panniers in it, I am sure my front panniers would fit but not sure about the rear. The handlebar bag, helmet, etc., would fit quite nicely for carrying in the motel.

Wheels on panniers? Never seen them.