I have never tried to mate them in tanks but my bet is it will not make a difference for the actual breeding. Once she is gravid however she needs to be kept in as perfect conditions as possible. The eggs themselves once out of the snake are very susceptible to humidity changes. I do not know what your preferred method will be to incubate but I do not think I would allow a female to incubate her own eggs in a tank. It is just very hard to keep those things tuned. Someone on here may have tried it but I have not.