Penny ... we were at Bernalillo KOA in June...as you know it is a nice campground, albeit secluded.
I am from Albuquerque and go home often. The Santa Ana Casino at Bernalillo does not have rv sites. They might offer boondocking.
However, there is a small city owned campground just east of it on a bluff above There is another Casino north on I25..near San Ildefanso Pueblo, if I remember correctly...I do not know if they offer camping.
There is, also, a campground in Rio Rancho, behind the Walmart Store.
We have not stayed there, as we, have in the past parked in our families driveway. With the Axis, and trailer, we needed more room hence the KOA.
Your situation now, is finding someplace to park, as most of the accomodations during the Fiesta are booked a year in advance.
There is camping facilities at the Balloon Park, itself, but doubt at this late stage you will find vacancy.
True..when we were kids, it was not an issue...now the Fiesta is so BIG, Albuq. is bursting at the seams during that time slot. Traffic is a beast around that area of town. If you get a place to park your rv, find a shuttle !
good luck and keep us posted on what you find !
Ron & Kay n KC too !
2016 Axis 24.1 E-450 6 spd.
'KC's Big Box'
Jeep Wrangler TJ
or 6x10 enclosed motorcycle trailer