Fo they fill 5 gallon water jugs

Yes

Yep. Easy. I fill mine all the time. 1, 3 and 5 gallon options. 30 cents all the way up. Takes coins only.

There is a dispenser at select stores that you can fill a 5 gallon jug. It's approximately 30 cents per gallon.

Yes. There is a filling station right outside the entrance.