I m a newbie. just signed up for a basic dslr @ knowledgebowl. cos i m on a driving trip to yunnan china this december. own a D90 with 18-105, 70-300 vr, 80-200 f2.8 & a 50 f1.8. to travel light & yet have great pictures which lens should i omit - 70-300vr or 80-200 f2.8. tks