All conc,
1. As no cabin crew on board, the 'passengers' will need to be briefed on emergency evac procedures. Briefing will be done by one of the flight crew and record of this will need to be on file at the departure station (for obvious purposes). This would also apply to airlines staff who are allowed to travel on board. One american carrier I worked for has a 'jumpseat qualification' test which you had to complete in the system, otherwise you would not be able to make a booking.
2. A jumbo full of horses will need more than a few grooms.. I have seen seat pallets which are basically a few (six I think) a/c types seats with oxygen tanks and life vests. Usually loaded at position CL. Base was thicker than your usual PMC..probably as thick as a 20ft pallet.
Anil