First time National renter here. Avis almost ruined my last vacation so this time I'm going with the National brand which has a much better reputation.

I've been trying to find info to answer this question but Google has not been helpful. Does anyone know what other vehicles may be offered other than the QX80 in the Luxury SUV category? We are driving around Yellowstone with 6 adults and the rear legroom of the Infiniti leaves a lot to be desired compared to the GM cousins and Grand Wagoneer. The cargo space isn't a huge deal as we'll only be carrying bags twice (back and forth to the airport). We won't need the extra space (or expense) of the ESV or Navigator L. What other vehicles might be available in this category at National? Any shot at a Denali or Escalade with SuperCruise enabled (for the highway miles from SLC)?

If there isn't anything other than the QX80 on site, is it difficult to downgrade to a regular full size or premier? Thanks.