When in Garganta Del Diablo, you do not need an Umbrella. Getting wet is definitely worth it. The walk from the train station to the falls is roughly just over a kilometre but doesn't feel that long as there is quite a sight to see. If you forgot to bring your camera, never worry as they have photographers at the falls who have a special spot that can give you a photo with the falls on the background. Around about 50 Argentinian pesos.
If you own or manage Garganta del Diablo, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.