I live in North Texas, Ellis County, I transplanted a Madam Planitier Rose in July! It is as hot here as Okla. I had my hole ready and used lots of water. I dug this large rose and then I had to tie a rope to it and tie it to my John Deer and pull it out! Yes it survied, last year was its first full season in the new hole, but it did not bloom last year. This year back to blooming again and growing great. I did cut it back maybe by 1/3 to 1/2. This Rose when I pulled it out was about 5 years old. 
It went from full sun to full sun.
I too would not want to leave my rose's behind.
Good luck,
Rosemary