Yep a long time ago i tried going in there once just to see if i could get the word of power but without the Bards Collage quest i couldn't find the wayout. According to this wiki and UESP wiki you can though as its used for other quests (radient ones), if you have no previous saves have a look at the two wiki pages (and the discussion sections for them) for the Respite and see if it helps.
If your on PC though just open the console (with the key above tab and below esc) and type -
coc riverwood
Then press enter.