depends how far where going and if its just sled deck or trailer, how many guys are going, etc.
luckily everyone in our group owns very similar rigs so we all know how much it costs to operate so one guy buys the driver sled gas, the other gets lunch, etc so really driver just handles his overhead for operation that day.
if people dont ever fork over coin to go riding, they stop getting called. or they start being forgotten when we make plans.