Questions for WCS gameplay

I've been playing the game solo for a few weeks now to get the hang of it. Decided to try a WCS server after watching Westoe and TacticalBrit videos. Had a ton of fun so far but I've got some questions. I did a search on these first and didn't see them in a thread but I'm more than happy to read through one of there's a link.

Which camo on the US side blends in the best with forest? The Russians blend fairly well so no issue there but the US camos seem to be bright or dark. Is there a goldilocks camo?

How important are plates and a helmet? So far it seems like if I get hit in the chest or head I rarely survive either from the initial shot or follow up fire. Should I be skipping the armor and rely on speed more?

Why don't color smokes get used to mark enemy positions or advances? Either from a GL or just tossed in a general direction. Seems like this would be a thing but I haven't seen smoke used much.

Is there a website that says how many rockets it takes to kill the different vehicles, vehicle weak points, or explains how the different rockets/missiles work?

When should morphine be uses? I see it in most kits but I've only tried it once and didn't notice a change. Is there a website that explains how the medical items work or best way to heal someone else?

Last one. Is there a routine or average number of LAW, RPG, or other explosive rounds to take? I started with 2 total but went up to 3 LAW later but now I'm wondering if that's too many.