It's very sad Willow that your local cemetery is currently closed. Seems an odd thing to do especially at this particular time of remembrance. I took a long and lovely walk in our city's main cemetery this morning and was moved, as always, to see the war graves marked with poppy crosses. It made me very emotional.
There were a few folk around, tending graves which was lovely to see. The trees are all turning colour & it was a most pleasant if sombre hour.
I do think it's a bit unreasonable for yr council to close your cemetery, so yes, write & tell them how you feel & ask why they feel it's necessary to keep people out at this poignant time.