At lease with OSP there is no bathroom cleaning. Yes, we check them several times a day to make sure there is paper and no trash. I am not opposed to cleaning them, but it is not mandatory. Basically we clean fire pits, rake the camp site to make it look nice, pick up trash and be there to answer questions and assist people. We are NOT police and DO NOT enforce rules and regulations. That definitely is the rangers job. We ask people to adhere to the rules and if they wont, we simply say have a nice day and call the rangers. In day use parks you will be asked to mow the grass, prune trees and shrubs in addition to picking up the trash. Then if there are reservation areas we make sure to turn the power on, check to make sure they have enough trash bags etc. It is really easy and a lot of fun. Lots of hosts have some sorts of handicaps and again they only do what they can. One host I know does the park store. 4 hours a day each for him and wife 5 days a week. They spend maybe 90% of the time sitting outside in the shade enjoying life.
In exchange for our time we get a full hookup site for the month.