With a crack James apparated right next to Sirius, completely by accident. As the Marauders had almost spent more time out of Hogwarts than in it as students, the memory of the outskirts of the castle hadn't been forgotten. "Whoaaa," he murmured under his voice, and then, realising who was next to him he grinned, his teeth flashing in the moonlight. "Ha! Is there no end to my bloody genius?", he laughed, giving Sirius a quick shove.
The night was still, only disturbed by a few owl hoots and crickets. James looked up at the castle and sighed wistfully, remembering some of the great times they had had here. Hogwarts meant so much to James, he owed his education, his friends, and even his wife to it. Walking on with Sirius, he could see they were approaching the main gates where they were supposed to meet. Obviously, they couldn't just waltz right in, and so James made a mental note of which passageway would be best for them to use.
"Up for this, tonight?", James asked with a glint in his eye, turning again to Sirius.