bats and slate roof

Have only done one home with a slate roof and it was a PIB. Not sure I want to tackle another.
Customer has offered services of a boom truck, so that problem is taken care of.
Any info to share?
Thanks

I've never been on a slate roof , do the bats get between the slate , I know I've laid plywood for slate roofs it was 5/8 ply and very heavy for sheathing a roof hard to handle , the truss system was engineered heavy to , but other than that it was the same , or is a old system , I know I've seen some old cedar shake roofs that would be very hard to bat proof , funny how you can see right threw the roof but it's still keeps the weather out