The following are previous posts:
I really would love to visit Salar de Uyuni. I have heard that there are many travel agencies who offer trips, but that a lot of them are quite bad. I would like to make a four day trip.
I would say that they are all quite similar. I have never heard a bad story. A great thing to do is go to the tourist information centre ( attached to a very good restaurant as well ), there you can fill in a form which asks questions about your priorities of the company e.g. how important to you is food hygene/quality, that they carry oxygen etc. Then they will search database and give you a choice of 5 companies according to your needs. Also if you turn up at about 7:00 hours, you can book a tour and go on it at about 9:00 hours that same day.
The Salt Flats tour is certainly a highlight of Bolivia. It is a bit lucky dip with tour operators, even if you book with one, you could get shuffled to another to fill up a vehicle. Mostly the food is pretty basic, accommodation even more basic. Buy some snacks/drinks in Uyuni before you go. Hire a sleeping bag through the tour agency if you do not have one. If there is one going without the full complement of six passengers, that would be better, the very back seat that holds three people is incredibly cramped. Also if you are heading to Chile, then get one with a transfer to San Pedro rather than head back to Uyuni. Do not forget your sunglasses, lots of glare.
My wife and I recently (July 2007) did the Salar de Uyuni tour, starting and finishing at Uyuni. We found it quite confusing beforehand to come by any useful advice, particularly regarding which tour company to use, so perhaps others might benefit from what little we have learned. It turns out that quite recently all the tour companies in Uyuni have agreed on a US$100 per person standard price for the tour with 6 people in a 4x4, $120 per person for an English speaking guide. Nonetheless, a lot of the companies will offer $85 per person, though persistent questioning will reveal that they are simply leaving out some of the things that the $100 per person companies include. Mineral water is one such item, also the national park entrance fees can be included for $100 per person. It seems quite difficult to get an English-speaking guide, although we managed it. I should point out that even at that, the guide was shared between two 4x4 groups. Whenever we arrived at a point of interest, both groups would get out and he would speak to us all at once. The tour company we used was called 'Sumaj Jallpha'. I can recommend them quite highly; our guide, Fabian, spoke excellent English and was perfectly knowledgable. The driver, John, was competent and friendly, while the Land Cruiser was in very good condition. Food and accommodation does not really vary by tour company, as far as I could tell. So, be prepared to pay around the US$100 mark. I found that the most common complaints from other travellers concerned either the driver, if you have not paid extra for a guide, or the condition of the 4x4. Everything else seems fairly standard. Ask lots of questions and be a little suspicious. Unfortunately, there is a tendency for owners to promise all sorts, heating for example, then simply disappear when the disgruntled traveller returns after three days. I hope some of my ramblings are helpful!
Jorge Daniel Barchi.
Buenos Aires.