Jūrmalnieki

Two people, car, tent for one night costs 10€ - you get access to toilet, well-equipped kitchen, shower, electricity. The campsite is well maintained. Only disadvantage is you can't park your car right next to the tent, but some ~30 meters away.

Giving it 5 stars despite of yellow water in the shower. Lovely people and great campgrounds. The camping houses are clean and so are the toilets. There's a shop and a Cafe right outside, which is extremely convenient

Nice place to stay with kids. Got trampoline, darts and some other games.