Are you 100% sure the bus has hydraulic brakes? If so then I'm sure it has a Hydrovac booster.
Tools/Things you might need...
Double Flair Tool for making new brake lines.
Tubing Bender.
Truck Brake Spring Pliers (for removing and installing the shoe return springs).
10 ton Jack (two would be better).
BIG HD Jack Stands.
Planks to put under the Jack Stands.
Wheel Bearing Grease to repack the bearings while they are out.
White Lithium Lube to use on the brake shoe/backing plate contact areas.
A can of Kroil or PB Blaster to spray on the lug nuts.
Truck X type lug wrench or 3/4" drive socket set with 4' cheater pipe.
Plastic to lay on if the grounds wet under the bus.
Light of some sort.
Case of brake cleaner, parts brush and a pan to wash parts in.
Chisels and punches as small as you have to the biggest.
8lb sledge hammer, 2lb ball peen.
Pry Bars (the more the merrier). Big tunneling/digging bar if you have one (I've used the tamping end like a hammer to drive drums off resting it on top of the leaf springs).
(2) Big C Clamps...you never know what you might need to keep from moving.
A full tool box with all the normal small tools, sockets, screwdrivers, pliers, hacksaw etc.
Safety Glasses and face shield to keep the junk out of your face while beating on things.
Rags, hand cleaner.
EZ UP tent to keep you dryer if it's raining...
Sounds like FUN!
Mike B
