That's a beautiful area you have there.
As far as the bars go, you'll see more benefit from disconnecting the front. Your rear has plenty of travel, but it's your front that needs help. In that second video, about 2/3 of the way up that climb, you can see your driver's front unloading while the suspension is barely flexing. Personally, I'd remove both.
Anecdotal reasoning: I removed both bars on my FZJ80 and even with 35s and a 4" lift, body roll is more pronounced but acceptable. Once the body rolls over and settles in to the turn, it's no less stable than when it had bars. Benefits include a much smoother ride on and off trail, and an approximate 3" gain of total travel (for me, at least; IFS probably won't gain that much).
Otherwise... it's really nice to see a Sequoia wheeling; I'm dancing around the possibility of ditching my 80 in favor of an '05-'07 Sequoia. Please post more videos so that I may be inspired.
Idea- Help increase the collective knowledge base by finding a loading dock ramp somewhere to flex out on with the sway bars installed. Drive up just far enough to pick a wheel up off the ground, and measure the distance from the center of the wheel hub to the bottom of your fender arch on all four corners, as well as the distance you travel up the ramp. Remove your sways and do it again. Maybe get some pictures as well. This could help set the baseline on a future suspension thread similar to the suspension sticky in the 80 series section.
