I'm very pleased to hear that others notice these things
Yes, there are quite a number of people who do a little bit in the cemetery. Many years ago I computerised the Burial Records and spent many hours walking about down there and it certainly surprised me how many people do small jobs down there. Several months ago i was driving past and saw two private citizens who had taken it upon themselves to clean and paint the Cemetery gates and posts, and was pleasantly surprised to learn that one of those people also makes small crosses bearing the names of those recently buried so visitors can find new graves.
Over the last 12 months, we've had a phantom tree planter who also waters them in the dead of night (I think) because I've never seen him/her coming or going.
Then of course there are the Service Clubs. Jamestown Lions Club made and placed the concrete blocks and paid to have them labeled, (an ongoing project as finances allow) and i think it was Probus and the Local History group who organised the new Notice board and directory (the Council paid for the board and provided the labour to erect it. There are probably others as well as I often see evidence that someone has cleaned up weeds or replaced Row markers etc.
Many visitors used to ask if I found it a morbid place to work, but no,... it has taught me more about my town and the people who have lived here, than the other 50 years combined. They are a very easy to get on with, lot down there.
Several years ago there was a veritable rush of new markers on old graves and old headstones being refurbished, I think it coincided with a resurgence in interest in Family Trees, This kept me busy recording the details of new work and even with the help of one of our local Monumental masons, I still think I've probably missed a few,... He's another man who does little repairs and and tidy ups without anybody realising.
One day he had to mix just a small amount of concrete to finish a job, but instead, he asked his off-sider to mix a large batch and make a small plinth for a previously broken headstone on a child's grave. It probably never cost him a lot, but it took the two of them another hour or more to complete by the time it was boarded up, poured and given a troweling, he took the time to made sure it was a neat and workman like job. He later told me that it saddened him to see that broken headstone to a small child just laying on the ground. (Grave BR06, William John Lewis aged 3 months months, if you are interested).

I can remember at one stage when I was a kid, the dry grass was so high we used to crawl around making tunnels in it.