A tour operator in Kazbegi arrannges transport to Juta and other places in summer only. Otherwise only taxis and hiking.
Roshka not accessible by road from Kazbegi, tough trek only.

Hi, will you do any trekking? (eg: Inca trail, W trek Patagonia?) if so then yes weather is important and you need to plan for the best times and avoid obvious bad times (eg: Feb when Inca trail is closed) and plan these activities well in advance. Also Patagonia is the most expensive part of South America so planning when to visit there if on a budget is important. If not trekking then I'd say don't worry about the weather as it's so diverse in South America even within countries themselves…

Hi Elisabeth, Perhaps you are referring to Jomsom which is a small village that you can fly into on the Annapurna Circuit. I've done many treks in Nepal and I've never heard of the Johnson Trek. Most treks in Nepal, especially for a first time trek, you can so as a self guided trek. On the Annapurna Circuit, Everest Base Camp, Langtang, and others the trail is pretty obvious. Many trekkers do these treks without a guide. There are a few treks in restricted areas where a guide is required -…

I'd like to travel from Porto to Pocinho (Vila Nova de Foz Coa) along the Douro by train, then take the boat on the Douro to Salamanca in Spain. However, many of the boat tours on offer appear to go no further than Barca d'Alva. Are there any (affordable) options to go to Salamanca by boat from Pocinho or thereabouts? Many thanks!

The decision to take a guide or porter in the free areas will depend on what kind of person you are, your past experiences at hiking in your own countries, level of risk you imagine is going to actually occur in reality, personal confidence, independence, fitness, basic sense of direction with half an eye closed and sense of adventure etc. you may have all of that and still choose to take guide and porter. There is nothing major wrong either way. The guidebooks and online chats will explain pros…

I haven't been to Easter Island, so I can't offer advice.

As for the rest, it seems you have 3 weeks and you're willing to go almost anywhere in the southern half of South America? You'll have to choose.

Sticking with the first question, starting with Uyuni, you can do a 3 day jeep tour to see the Salar de Uyuni and a lot of high altitude lagunas, and that will leave you in San Pedro de Atacama at the end, in Chile. San Pedro is worth a couple of days at least, because there are things to see…

I did AC for my 4th time in Jan - Feb 2016, and there were no rickety bridges - I can't remember the last time on the main trekking trails that I crossed that type of bridge.

Perhaps look at doing Langtang valley trek in the time you have available - it gives you an experience of being in the mountains, as opposed to looking at them from a distance.

I have only trekked once in Nepal in Oct - that was back in 2005, when the civil war was still running, which kept the number of trekkers down…