So found some stuff out about the spaceships:
"Originally, there were two types of ride vehicles: the dirt bikes we know today and a spaceship. I can’t find images of the ship anywhere online, though the proof is still in the queue. When Botanicus (the leader of The Green Planet – where E.T. is from) appears inside the forest of the interior queue he begs visitors to “Hide E.T from the scientists who seek him. Bring him on a spaceship or carry him on your bikes.”
Guests were requesting to skip the spaceship in favor of the bikes, plus it was hard to see out of them. Ultimately, Universal ditched the spaceships entirely."