The other thing you can do is create a little self watering feeder bottle (to not deal too much with hoses and water supplies etc.) Depending on the size of your pots/seedling cells, you need to assess how much water you'll let your pots sit in. You can then drill the tiniest hole to maintain a very low water level. I've made these for all my indoor plants with plastic bottles, works like a charm.
For small seedling cells, I would spread a piece of fleece or something maybe (to work as a capillary mat) and then set the water level very low (controlled by hole size and location of hole.)
The guy in the youtube vid fills his bottle through the bottom hole. Since my bottom hole is small, I plug it with my finger and just open the top lid and fill it up that way (to create the vacuum required.)
https://www.youtube.com/watch?v=Ffe7...-DCeKqvfj7C0oA