It wouldn't have been unreasonable to expect that if you were out and about and the **** was about to hit the fan, that you would be able to search the surrounding area and come up with something to use as a pole.
Absolutely. The pole is the weapon of wing chun.
But people weren't strolling around routinely carrying swords...even relatively short ones like the Wing Chun knives! Maybe you could find a big knife to substitute for your Wing Chun weapon laying around in the area....but TWO such knives? Unlikely! I certainly can't picture Ip Man or Yuen Kay Shan routinely strolling around in public in Foshan with two big knives/short swords on their person. Can you?
Militia members did use double dao in the 19th C. and there are pictures showing these. Sailors also used them. Of course usually it is the leader with the dao and everyone else with spears. And these fighting dao are very different from what we see in WC today. Much longer, point biased.