I have concerns over our Disney Fantasy Deck 6 Aft staterooms after reading many accounts of significant vibration problems. We are specifically in rooms 6673 and 6682. For those who have stayed on deck 6 aft is it really that much of an issue? And any reviews of those specific staterooms would be great! We have been on the Disney Fantasy before deck 9 midship and there were vibrations but I didn't find it to be that bad. Thank you so much!!