I'm going to be travelling through Bolivia for about 9/10 days in May. I hope to do the 3 day Unuyi salt plains tour from San Pedro in Chile and then on the 3rd day rather than staying in Unuyi i''d like to head straight to Potosi. I believe the tours generally end in Uyuni at approx 3pm.
Are there any late afternoon buses to Potosi from Uyuni? Alternatively how much would a taxi cost to make the trip? I believe it'll take about 5hrs by taxi and 6 by bus. Does this sound about right?
Finally what is the temperature like in early may during the day and at night on the salt flats?
Thanks in advance.