We are wanting to do a tour starting from San Pedro de Atacama and finishing in Uyuni in the last week of June 2014. Has anyone recently been on a tour like this and can recommend a good company? Also we have heard that this direction (from San Pedro to Uyuni) causes a lot more altitude sickness than the other way around - if you did or didn't experience this, we'd love to know! Also, I think most tours start from the Chilean border so what did you use to get there from San Pedro? Thanks in advance!