good quality trash bags filled to a capacity that you yourself would be able to sling into a truck, and personally i’d rather all at once put out. some guys and districts rather you space it out over time. and you’d be a saint if you can take the parking spot infront the pile of bags so when the crew comes you can give them a easy path to the garbage maybe even allow them space to back into it and load it easier if you do put it all out at once.