Protecting Primary Home

[Aaron Taulbee]

I'm in the market to buy my first investment property, likely a duplex in the Atlanta suburbs. I've been fortunate to have bought/sold my first home and roll the majority of the profit into my current home, so I have $200k+/- equity in my current residence. I plan on holding title to my investment property(s) with an LLC, and I will likely purchase an Umbrella policy to boot. Questions:

1. Do most investors put their primary residence into a seperate LLC or their wife's name? Would this be beneficial in a "worst case" pierce the Investment LLC veil scenario?
2. Do most use give their personal address to tenants for mailing checks to, or do you use a PO Box to keep them from knowing where you live?
3. Anyone use Google Voice or similar to have a seperate number for tenants to call apart from your real cell phone number?
4. Am I overthinking the need for anonymity?

Any help is appreciated. I've really enjoyed the wealth of information I've been absorbing on this webpage to date.