Hei Bert
Good to hear from you.
Excellent - a week in Iceland during late winter / early spring - Sounds great !!!
First of all, your route will dictate where your potential campsites will be - and your route will very much depend upon the weather in Iceland (which is highly unpredictable at the best of times...whatever time of year)
Not all roads are open or accessible during this period, unless you are a fully dedicated 4x4 with snorkel (river crossings) and compressor (reinflate tyres after adventure...) and seek the high risk adventures
Take a look at the
Icelandic Meteorological Office (IMO) website
and the
Icelandic Road and Coastal Authority to see which roads are open / closed due to snow & ice (updated regularly).
Both websites are invaluable...
You say you are renting a camper, so I guess you are looking for the more "plug & play" campsites, which offer better facilities and electric, etc.
Due to the style of expeditions we do, we also camp in the less obvious / remote campsites.
Most "obvious" campsites are located near or on hringvegurinn (Ring Road 1), or near major tourist sights.
They are usually well organised, with toilet huts, water and electic, shared cooking facilities, etc.
However, Iceland is more "raw" than some other parts of the world, so you may find the facilities "basic" even at the better campsites.
If you like swimming, there are lots of great places to swim, and commonly close to campsites.
They are a great way to relax after a days trip - usually very hot water form local geothermal areas - the hot pots are wonderful.
Some campsites have a small "office" where you pay.
But a lot have no office, with just someone coming around in the evening or morning to collect the fees.
The fees are usually not so expensive (but I live in Norway, where absolutely everything is expensive...)
Not knowing your itinery or route doesn't allow me to be specific about campsites, but I can help later, if I know where you intend to visit :)
Top tip - Take sensibe winter clothing - Iceland can be very, very cold that time of year.
Sensible walking boots when not driving.
If you are not used to driving on snow and icy roads, I suggest you take it easy, and never push yourself whilst driving.
We are used to driving on compacted snow and ice roads over here, but it can really catch you out if you are not used to it.
Most car accidents in Iceland are tourists - a lot of these accidents are due to inexperience on loose dirt / gravel roads and / or Snow & Icy roads.
Visit our last Iceland website:
www.ice2017.no - There is a lot of useful info, maps, links, travel blogs, etc.
Good luck with your trip :)
And if you fancy a quick and funny Icelandic Lesson, watch this "inspired by Iceland" Tourism Video:
The Hardest Karaoke Song in the World!
Cheers
Neil :)