I think its a joke they require an additional $20 for a next day return fee.

I'm talking on the way BACK. A next day "Return" fee

It's $20 only weekends, $10 on weekdays. I believe the reason they do it is because you are taking a seat that could be sold at the normal price of $22 to a customer that is heading out to Wendover. they actually lose money if they sell out the bus, which happens quite often on the weekends. I'm only talking about prepaid returns. I believe Walk-Ons are charged because there's no way of knowing if they actually paid for a trip out there