Could do both, C-17 being seen off by Princess, then the party by 32 Sqn timed to arrive first and greet her on arrival.
Surely, they can palletize a couple of VVIP seats and fit the pallets etc or what about the VIP portacabin they used to have for the Herc fleet, do they still exist?
I think you’d want an empty hold except for the coffin with suitable accoutrements, waiting for the bearer party to board.