Yes you can pre book a transfer (arrival only) and extra nights with Shoestring.You can add these on to your booking form.
You will not be allowed to carry a mobile phone or GPS into North Korea. If you do bring one in, it will be wrapped in packing tape and signed by a customs officer on entry. When you leave, it will be checked off and unwrapped for you. International calling is generally possible from hotels, though it is expensive (€4-5 per minute) and all calls will likely be recorded and monitored.
Internet facilities are limited. Some of the larger hotels can arrange access but you'll have to let your tour guide know in advance, so they can arrange it. You will find some websites are blocked.
First Aid Kit
The first thing on your list should be a first aid kit. Whilst there is no undue cause for alarm, it's wise to travel well-prepared: adequately immunized, with sufficient supplies of prescription medicines/drugs, along with a medical kit.
It is recommended that lighter clothes are worn through the day, and warmer ones at night. A hat is also advised to be worn through the day to protect from the sun. At least one piece of waterproof clothing should be taken.
Footwear is a main priority on this tour. Comfortable walking shoes/boots are recommended.
Luggage should not exceed 20kgs (44lbs). One large suitcase/rucksack, and one small hand luggage rucksack is acceptable.
Sun cream/sunblock is a must – please ensure you bring enough as it may not be available in North Korea. Insect repellent, including a bite spray will also be useful to bring.