I shot one roll of Kodak Ektachrome while on vacation in Mauritius. I share here how I measured the scenes and what exposure I chose.
My own takeaway is that it pretty safe to expose within the -2/+2 range, maybe try not to go beyond +1 on the highlights if you can. With a proper spotmeter I would have maybe got more precise readings. The images tend to be on the bright side, but for these outdoor / daylight scenes I prefer this look. I should do such a test in a dark and moody place...