Tough choice but I think you made the right one. If the whole kit gets too heavy or clumsy, just take the 80 along. What's that stat? 70% of all (good?) photos are taken with a 'normal' lens?
After being a bit disappointed by my 35mm negs at 11x14 I took my much heavier c330 w/ 1 lens (the awesome 80) to Prague and every negative is beautiful if not noteworthy.
That being said, a super light and inexpensive Rolleicord IV accompanied me to Ireland and I was very happy with the negatives and my back thanked me.
Have an amazing trip. Theyre all such incredible places.