So am I better off driving up to resort or taking the gondola from Aosta?
Top section is about 2.5km with a couple of different options, lower is about 12km with fewer options. We did the top blue to get the eye in, the red, then a coffee. After that we went back to the top for a red top to bottom, pedaled back to the gondola (maybe a mile of pedaling) and to the mid section for lunch before another top to bottom.
By halfway down the lower section I was utterly wasted, covered in dust, had one high speed fall, huge smile on my face!
Sounds like the bikes from the bottom of the gondola will be decent so first choice would be hire from there. If you have to finish the day at the mid station you still want to park at the bottom of the gondola, there was a guy ragging it up the switchbacks on a small engined motorbike under the gondola and we got there a long time before him, road is very small and tight. Gondola would drop you right back at your car any way.
The owner of the chalet we were staying in came with us, he was saying the last guys in his chalet who went to Pila parked at the mid (resort) station and came home pretty disappointed about the trip, they’d not seen the start of the lower trail (over the wee ramp by the corner of the chairlift past the wee hire/repair hut) and had ridden the top all day. Big part of the enjoyment was the amount of descending without having to pedal at all!