It's the only chance to reach the dunes prior sunrise. Everyone outside the national park has to wait until sunrise. Be aware that it's approx. an hour to drive towards the dunes.
We managed to get a place in the overflow area (T6) which is quite a walk to the toilet shower area. The staff is like all other NWR staff very unfriendly and roude.
The bar is nice and the food is good.

We found the campsite very good - light and electric point at site very useful and clean ablution blocks, BUT the staff at the shop and restaurant need some help with how to deal with the puplic. The receptionist was excellent - very helpful and told us everything we needed to know, but the shop/restaurant staff were particulaly unhelpful when it came to paying by credit card. If you are going to go, take cash, otherwise you will have steam coming out of your ears! of couorse, all this could be solved if they get extra card machines.

This camp site is located at the gate to the national park although it is still and hour to the main dunes car park so expect some early mornings to see the best of the dunes. The plots on the campsite are shady and nice and those on the outside edges have good views. There is a pool and a bar. The toilets and showers could have been cleaner and more numerous but a good budget place to stay. The dunes are wonderful - definitely worth a visit.

Seariem was easily the best of the sites we stayed at in our 2 week trip to Namibia. The individual sites themselves were all nicely shaded with walls, benches and firepits. The pool was large and clean, the shop was well stocked an the bar was manned by friendly staff.

Anything we couldn't get here (internet access) was available just across the road at the fuel station. The camp is the best spot for getting to the dunes for sunrise, we entered the park when the gate opened at 5am, were the second car at the dune and at the top long before anyone else