It would depend on how I am traveling and where I am staying.
If I plan on renting a car and will in be the country side for landscapes I would travel with my Mamiya Press Universal with a Normal and Wide, and a 35mm with 4 primes, 24mm, 50mm, 105mm and 135 or 150 (Pentax 42mm) and a good quality point and shoot.

If I plan on staying in a city and using public transportation and doing a lot of walking I would just take a 35mm with same primes and a point and shoot.

Other option for light travel is Sigma SA 9 and Sigma SD 14 with 2 zooms 28 to 105, 70 to 210 and a 50mm prime.