Am I picturing this correctly? You have a regular 6' fence, but there's an 8' wide section that's now 11-1/2' tall (due to the added lattice). And you'd like to take another 9' section of fence (3 panels x 3' wide) and make it 8' tall with bamboo panels. Is that right?

Do your neighbors have a 1-story or 2-story house? How close is their house to your fence line? Are your neighbors usually home during the day?

Have you checked with your city and/or homeowners' association regarding restrictions on fence heights?

Losing trees and their inherent privacy is a major bummer! But I'm trying to get a picture of what your fence is like now and what you're proposing to do....along with gauging your real "need" for privacy.