I agree entirely......I think I wrote about this in the forum a year or two ago......returning home from RJ one time, my itinerary had a plane change at Iguazu (I didn't plan that intentionally)......realizing the layover was about 4.5 hours, I thought..."hmmm...is it possible??!!"......I went out to the airport lobby and stepped up to the first tour desk to ask if anybody is available for a quickie tour of the Brazil side with return to the airport in time.....she said people do that all the time and she had a private English-speaking driver (I did have to explain what a "hawker" is on RJ beaches!) there in 20 minutes and off we went.....he helped with admission logistics, talked about the animals and plants and stuff, dropped me at one trail entrance and met me at the other end of it, told me where to go for other photo ops, the whole bit (Brazil side).......the entire thing (guide, transport, admission) ended up being about $150US which seemed like a bargain since many spend thousands for a trip to Iguazu......it's a spectacular site