Until a more accurate GPS system is put into general use, finding stones at the cemetery will be difficult in many cases. In the meantime, in addition to wandering around the area two methods are available that may help. The first is the available in the following links to maps available at the town hall.
The second is as follows: When looking at the picture of a stone on this site note the 4 digit number at the end of the url in your browser. It will look something like this: http://www.hopehist.com/Himages/HP1521.html. Looking at the cemetery from the main road note that the area is divided in thirds by two roads. The left side contains numbers 1143 to 1259 with the low numbers in the front near the main road. 1259 will be near the rear. The middle third runs from 1260 to 1415 and the right third from 1419 to 1525. In the url example, 1421 should be near the rear of the right third.
A few of the stone numbers have less than 4 digits which cannot be found with the second method.