I'd say it's a guarantee that you'll get a considerably better rate using pesos.
Taxi's are required to have their rate cards with them, and present them to whoever asks.
I paid 50 pesos one too many times this last trip that should have been 26, but due to a special circumstance, I promised the Mrs that I wouldn't make a scene. In the future, they will be producing the cards.
no one likes to be over charged, but 24 pesos is about $1.25 at current exchange rates.Ask what fare should be before taking ride if you have any doubts. I've never had a problem with taxis in COZ.
the bag drag is a lot easier than it sounds. You basically just pull your bag through an outdoor shopping mall from the street to the waterfront. Baggage handlers will offer to do it for you for a modest tip. Plenty of places to stop for a drink or snack along the way and frequent ferry service means you never have to wait long and you dont have to worry about missing the boat.