You really need to listen to what people are telling you and contact the airline and ask them. Just because they might take the scooter off you at the gate and gently place it in the hold doesn't mean that the ground handling staff on the other side will bring it to the aircraft doors when you land. Airlines need to arrange assistance in advance for their passengers. You really need to talk to the airlines and see what they say about the scooter or if you will have to arrange wheelchairs through them.
Why don't you just ring them? It could be sorted in minutes.