Disco 1 Rear-facing child seat

Mini-Pete has now outgrown his first car seat, and we've got one of these all-in-one seats which will do until he no longer needs one. The seat can be fitted rear-facing up to 18kg (which we're keen to do for safety purposes) or forward-facing, all secured with the 3-point belt.

Problem: 3-door Disco 1. I can get the seat into the back of the car, but loading/unloading a potentially-uncooperative child through the front door and into the back of the car may not be easy. In the old seat he rode in the front next to me, with OH relegated to the back. But, while the new seat physically fits in the front seat, I can't see the door mirror!

So what do I do?
1. Rear-facing in the back, living with the hassle of getting Mini-Pete in and out.
2. Forward-facing in the back, which is allowed but isn't as safe.
3. Rear-facing in the front, and devise some kind of extended/additional mirror for that side?

Safety first init.
Put him in the back & live with the hassle or fit a mirror on the wing/bonnet like the old Pajero's...

Pajero solution could work. We've got a clip-on mirror so we can see him in the back- maybe it will clip to the corner of the bonnet and serve as a wing mirror