On the local fishing pier in Pacifica, California, where I live, the fishermen have been busy modifying grocery carts to serve as movable tool boxes and gear haulers. There are many ethnic migrants here who are not afraid of making or altering something themselves. A common device is to affix sections of large diameter PVC water pipe to hold fishing poles.
Another guy uses a defunct carry-on travel bag for his tool chest.
I like the use of plastic bottles for floating bobs.