Any of the Coleman ones are decent. I had this 6-Person Skydome until I bought my little trailer and it worked well. Coleman is the cheapest I'd consider and you can get these at pretty much any big box like Walmart or Dicks or Academy or Target.
https://youtube.com/playlist?list=PLUA0LIEAaQtu03t1XJG4jfGzSFw-hNxcd
This playlist by festival finesser helped me a lot plan out what I needed and how to fit everything into a vehicle. I know he is dubstep themed, but it still fits the bill. Also, I highly suggest a blackout tent especially in the summer time as it helps a little with the heat inside. I am gonna be buying myself this one for my next festival:
Coleman Skydome Camping Tent with Dark Room Technology https://www.amazon.com/dp/B07XHYJTXD/ref=cm_sw_r_apan_i_JE2XYX8WMY95XN8C6RH9?_encoding=UTF8&psc=1
This part of the comment is meant for your wife: Camping at festivals can be frustrating at times, but the experience is awesome either way. Find ways to make things easier for yourself with cooking, showering, or setting up. The less time spent doing "chores" the more time for fun and relaxation and thus less frustration! My boyfriend and I have a blast every time and learn from our "mistakes." Just stay patient and remember we are all here for each other and everyone around you at camp can help in dire situations usually!! Rest as much as possible and hydrate hydrate hydrate <3
Well, then this one - https://www.amazon.com/Coleman-6-Person-Dark-Skydome-Camping/dp/B07XHYJTXD/
I don’t have a Coleman tent, I use a 3p backpacking tent.
I was thinking of this one.....https://www.amazon.ca/Coleman-6-Person-Dark-Skydome-Camping/dp/B07XHYJTXD
What do you think?