| You can't get back in to Fargrove yet. I'm not sure what exactly triggers the sequence that gives you access again, but I know that eventually you will be able to re-enter. You might want to make sure you've talked to Lord Graemere in Bolen's Field (he's the one near the tents). And you might want to finish the quest line in Arindale that leads you to talking to the mage in his tower (and return to the mage after completing the quest he gives you to go to Talendor), if you haven't already.
I'm sorry I can't be more specific, but that is normal and you still need to trigger a quest line to get back into Fargrove. |