Hmm... I've always left my lowepro offtrail 2 on my lap throughout the flight. Flight attendants didn't object when they saw it leh... I guess the next time i should at least put it under the seat infront of me during take off and landing for safety reasons.
check-in tripod in the suit case
carry on small camera bag with body and a couple of lens
Tripod to carry if possible, else bo pian dismantle the ballhead, and ask them to label as fragile ++ on the tripod
My bag with the camera and lenses under seat or above the cabin.
Under the seat in front of me. Was a seven million dollar home but still managed to fit under. If you want more leg room then can just put in the overhead compartment, shouldn't be an issue at all.