It would be preferable if you could wait until after you have moved before getting another bunny. Would this not be possible?
Trying to bond two female bunnies is probably the most difficult bond of all the options. Does are very territorial. If you then complicate the issue even further, by trying to move two unspayed bunnies in the same carrier, I fear the outcome will probably be distress and aggression for both bunnies. Bunnies can inflict serious damage on other bunnies. They will be hormonal, unbonded and possibly worst of all, neither bunny will have anywhere to run to for an escape.