My husband and I have trekked many graveyards locating and recording information found on tombstones. We've done it at night with flashlights. We've done it with babes in arms and we've done it at the risk of having to buy out all the "Chigger-rid" the local stores had in stock - and it's always been worth it!
Many graveyards have been canvassed and the information has been put on the internet. This is a real boon to genealogists; yet, if at all possible, it is still better if you can actually go to the cemetery yourself. When someone else copies the information from a tombstone, there is always the possibility of error. Also the way the tombstones are laid out is often a clue to family relationships. When you copy information from cemetery headstones, you should always also include a simple map or description indicating the physical placement of the graves. Another good reason to visit the cemetery yourself is that it gives you the opportunity to copy information from the tombstones close to the one you've been looking for, especially if it appears to be a family plot. This information can give you clues about family relationships which you may have been missing...