Wanting to do the Sierra High Route

I've had this route on my list for decades. When I was in my early 20s I had bought all the maps and displayed them across my rented wall.

I have always been fairly poor, so the idea of taking a month off of work to spend all this money and come back with more bills always seemed too big of a hurdle. Maybe it wasn't, but it felt like it.

Now I'm entering a time when I want to quit my job and make a move. What better time to hit a long trail? I've got the savings and a place to return to.

I have a few questions regarding the route.

1. are people bringing bear proof boxes for the route or just a classic stash spot away from camp?

2. for sun pro, I was thinking hooded sun shirt+sunglasses+hat + umbrella? I've never used an umbrella before while backpacking, but I have used it on day hikes. Seems hard to use with poles but maybe strap it to your back?

3. Seems like a low population trail, which is perfect, how many do you think hike it every year?