"I've no idea how much effort it would take," Strange admits. "But if I feel my energy start to wane, we'll return back to the campsite." He's not exactly the world's best judge of his own stamina, but Strange is fairly confident that he'd at least be able to tell when he's reached a point where he can't do anything.

But at Tyki's statement, Strange nods. He stands up from the blanket and it already looks like he's ready to go. For a grownass magician, he's looking a lot like an impatient child at the moment. "Shall I wait for you here or will we meet at the edge of the lake?"

Based on how fidgety Strange is, it's obvious what he wants Tyki to pick. After all, he can get some of the magic started if he meets Tyki at the edge of the lake instead of waiting here.