Do I need a private tour?

Not unless you want to spend significantly more. Group tours use 4x4 Toyotas and allow you to split costs with 5 other travelers. It is the social norm.

Can I do this tour in reverse?

Yes, many people start in San Pedro de Atacama, Chile, and finish in Uyuni. It is the same route, just in the opposite direction.

Planning a 3-Day Salar de Uyuni Expedition

Book your tour directly in the town of Uyuni at least one day in advance to secure a reputable operator. Pack layers, plenty of water, and extra cash, as the high-altitude environment is physically demanding and lacks ATM access.

Get to Uyuni. Take a flight from La Paz to Uyuni, or a comfortable overnight bus (e.g., Todo Turismo). Do not skimp on the bus; choose the 'cama' option for a flat-reclining seat to handle the rough road.
Select a reputable operator. Visit companies in person in Uyuni (near the main plaza) rather than booking online. Check vehicles for seatbelts and verify they have a satellite phone and oxygen tanks. Popular, reliable agencies include Red Planet, Quechua Connection, and Perla de Bolivia.
Prepare for altitude. Spend at least 2 full days in La Paz or Potosí to acclimatize before arriving in Uyuni, which sits at 3,656 meters. Consult your doctor about taking Acetazolamide (Diamox) if you are prone to altitude sickness.
Check the logistics. Confirm your tour includes the entrance fee for the Eduardo Avaroa National Reserve (150 BOB) or clarify if you need to pay this in cash at the border entry gate.

Do I need a private tour?: Not unless you want to spend significantly more. Group tours use 4x4 Toyotas and allow you to split costs with 5 other travelers. It is the social norm.
Can I do this tour in reverse?: Yes, many people start in San Pedro de Atacama, Chile, and finish in Uyuni. It is the same route, just in the opposite direction.