We are traveling with our 2 year old and have 10 days to either start or end in Salta and work our way to/from Santa Cruz. Would like to visit Tupiza, Sucre, Samaipata and either Potosi, saltflats, or Amboro N.P. With altitude in mind, would it be best to start in Santa Cruz and work our way to Salta? Or just skip saltflats altogether? We've been to 18,000 + feet before w/out difficulty but I'm not sure how our child will do.