We splurged and went with Adventure Caravans. It was expensive but we felt it was worth the money. Most of our meals were included in the cost, plus we had water and electric hookups and pump out service - we were there for 11 days. We also had bus tours to local areas of interest. The bus service from the camping area to the launch area was terrific. It was a great experience.
I also think it is important to plan to be at the Fiesta for several days because if the weather does not cooperate, the balloons could be grounded and your trip and cost would be a waste.
2014 Triple E Regency GT24MB (Murphy Bed) with all the good stuff
towing a 2016 Jeep Cherokee TrailHawk
Berkley, the amazing camping cat missed dearly (1996-2012)