I've used a 'normal' saloon style bike rack on mine before. It fitted ok and the bikes were safe.
The only downside was that my boot lid flexed under the weight on the bikes and racks, and some unpadded sections of the bike rack frame came into contact with it and scratched it.
Depending on the bike, you can get bikes in the passenger side reasonably easily. Drop the forks out and put headstock into footwell with rear wheel up against passenger seat at kinda shoulder height. stack the front wheel on top of that. Thats how I transport both my 24" mtb and BMX about the place, its only 3 botls normally to drop the forks out.