Thanks for the clarifications. I knew people could receive packages there, so "mail" was a broad generalization and I wrongly assumed that included USPS deliveries. Who knows where I saw / read that. I'm on information overload and for all I know I might have heard it from a barking dog.
It's not a pressing issue at the moment....when my boyfriend and I split up he is taking a leave of absence to go to MI to care for his aging parents for several months. When he returns I will use his address as a domicile. He works for a regional company and is required to live within the region.
It would be nice to have other people here who could help me out but I'm so introverted I have never engaged in more than casual conversation with neighbors, and my family lives across the country (also in MI).
I could set up a domicile in any number of favorable states, but I'm concerned about losing my regional healthcare provider whose services aren't offered in NV, SC, TX, FL, etc.).
Anyway, I'll get it figured out, whether I temporarily use the address of an RV park that allows SUVs or a homeless shelter. I haven't found any info online (or from the DMV) for other alternatives in this state.