You can tap water and empty the toilet. One drawback: only accessible on the Haparanda - Kalix side. If you drive towards Finland you have to pass a bit, and turn…

Great stop to empty the toilet and fill up with water. Direct draining of the gray water is not possible, you would have to walk with buckets yourself.

Great place to empty your toilet and take in water. People also spend the night here, which is permitted in Sweden. However, traffic noise. There are also toilets with water flush. Clean? Depends on crowds and time of day.