When I used to do 2 and 3 week trips we did all carry on. That was back when the liquid thing was not an issue but for 8 days, you should be fine. You can cram as many 3 oz bottles of lotions and potions in a 1 quart bag - I'm here to attest to that, lol! Just be mindful of you luggage size so that you are considerate to other passengers regarding overhead bin space. On most airlines you are allowed 1 small suitcase/rollerboard and one "personal item" - i.e, a small knapsack, laptop case, large purse. I saw someone try to get on our flight to Chicago last week with two rollerboards and the airline personnel made them check one of them.