Well, at 3ish, he climbed into bed with me and we had a long and disjointed disagreement about whether there would be any booby. IIRC, I won (no booby) and snuggled and went back to sleep.
Tonight, R. got out the box with his brother's gift to T. (maybe last Christmas?), which is a stuffed animal, a turtle with a hard plastic shell that lights up and projects stars on the ceiling. Or wherever. T. thought this was pretty cool, but it definitely dragged out the going to sleep process. Eventually, I left and T. fell asleep with R.
T. is in the queen sized bed this time, so I am optimistic about making it through the night uninterrupted.