Ian Moore wants advice on where to go in Poland.

I had a fantastic four nights in Zakopane, the gateway to the Tatra National Park. Great accommodation cost us €10 per night and we hired a guide for our party at €60 per day. September is mid-season and a great time to go. We arranged it all through an excellent local company Altius (altius.pl/pl/main2.html), and also did white-water rafting with them. They also offer airport transfer at a very reasonable rate.
Morris Williams

Krakow has to be one of the most beautiful European cities - small, so manageable for a few days. Wonderful sights, fabulous architecture, very friendly and brilliant jazz clubs - mainly in converted cellars below the ancient city buildings. Everything was really cheap, too, and great quality food and drink. Don't forget to try the bison grass vodka Zubrovka - often mixed with apple juice. Don't stay in any of the big international hotels as they all seem to be about 40 minutes' bus ride from the old city. Instead, ask about private rooms at any of the tourist information offices - there's one near the main bus and railway station: Waweltur Office, ul Pawia 8 (+422 1921).

A day visit to Auschwitz is really a must - it shouldn't spoil your stay, but will give you something to think about for a long time.
Sue Williams

A good website for guesthouses and hotels is travelpoland.pl.
Anna Mercy and Liz Cole

Evelyn Daly wants to spend three months in New Zealand. Should she buy a cheap car or get a long-term car hire deal?

I bought in an auction (easy to find in the newspapers) but discovered later that it would have been easier still to go to the budget travel hostels where travellers leaving usually sell their cars/vans on the noticeboards. I bought a Hiace van, and kitted it out (you can find the same thing already done out, sometimes very nicely, from people leaving). Then it becomes a great way to go, especially on the South Island where it is so easy to park up anywhere, usually with five-star views, alternating with nights in the numerous motor camps which are exceptionally well equipped.
Jacinta Byrne

We bought a van in Christchurch in November and sold it in Auckland in January. We bought and sold it simply by answering and posting adverts in hostels in central locations in each city. Internet cafes are also good places for adverts. We were lucky enough to make a NZ$300 profit on our van, selling it for NZ$2,500! However, even if you sell it on for less than you bought it (which is likely), the cost of travelling round the country is excellent in comparison with other modes of transport.

All vehicles in New Zealand need a Warrant of Fitness (WOF), like our MOT, and you have to transfer vehicle ownership on purchase or sale; this is done at the post office. If it's not already registered, you'll also have to pay for this. Finally, take your AA card if you're a member - you get reciprocal membership - and make sure you visit the Catlins!
Dan Rodeck

If you have friends to do the buying before you arrive, and the selling after you leave, this will most likely be the cheapest option, but only on an older car (say 15-20 years old) and provided that there are no accidents or mechanical breakdowns. The inevitable price drop on a younger car on an urgent sale may make renting a better option.

Reputable nationwide companies like Apex Car Rentals (apexrentals.co.nz) offer a large range of vehicles of all sizes and price levels, and their prices include insurance and breakdown cover. They are also able to offer things like maps, child seats, useful local advice, ferry ticket and accommodation bookings, and free car exchange across the strait (saving a substantial cost in transporting the car on the ferry).
Adrie Kruiniger

We found Rent-a-Dent (NZ phone 0800 736823, rentadent.co.nz/) absolutely trouble free, and you can drive on on grit roads which some companies don't allow.
Kathleen Bentley

This week's questions

We're planning a six-month trip to India. Is it a good idea to take a water filter as an alternative to buying bottled water?
Bill Driscoll

Some friends and I will be spending four nights in Ljubljana. Are there are any good spa centres nearby open for non-residents? We are likely to hire a car.
Casey Early

Is it possible to use credit cards in Cuba? I've been told that you can't use cards that have anything to do with America, but I'm finding it very difficult to find a bank in the UK that does not have American backing.
Karen Davies

Any advice on where to go in northern Sulawesi? Is it safe?
Christopher Gardner

· If you have advice or questions, please email: ask.a.fellow.traveller@theguardian.com. Or write to: Ask a fellow traveller, The Guardian, 119 Farringdon Road, London EC1R, 3ER.