Luggage and bags: There's no such thing as bad weather, only the wrong kind of clothes :))
Clothing/Shoes/Weather Gear: Be prepared for wind and/or rain when you visit in summer. Temperatures can range from cold to really warm in summer, so be prepared for anything from 10-25 deg C (50-77 deg F)
Toiletries and Medical Supplies: Pharmacies are called "Apotek". Be aware that many medicines which may be easier to buy abroad need a prescription in Norway (eg anthibiotics and heavy painkillers)
Be sure to bring the supply you'll need of your usual medicines.
Photo Equipment: Easy to get all kind of films and photo equipment - films may be more expensive than home.
Luggage and bags: Even in April it is not always cold - but it can be.
Take clothes which you can build up in layers and do not be relying on one weight of socks. I went prepared for cold and had to buy some lighter socks!
Clothing/Shoes/Weather Gear: It can surely rain and out here when it rains it does rain!
Toiletries and Medical Supplies: Normal
Photo Equipment: This is so photogenic that I would almost say set yourself a limit - or it will cost.
Camping/Beach/Outdoor Gear: Normal