Traveling stresses me out!

We're flying to MN next month for my brother's wedding. I'm trying to buy our tickets and rent a car today online. What a huge PITA! Priceline gave me a good price but when I try to buy it- it tells me it can't find my flights and to select other (more expensive) flights. I think I'm going to just get the flight through priceline and get the rental car directly from the rental company and use a 20% off coupon. We won't be able to pick up our car until Monday though, but that should be ok. We'll fit in Dad's car ok, we just want our own car because everyone else is heading to the wedding 2 days early and we're not. Dad sent us the money for the trip but now that it's all jacked up we're going to end up paying for some of it ourselves. Which is fine really. I'm just thankful Dad was willing to help us out with our flight.