Currently, I am technically in a Bortle 5 area, but with the street light in front and behind, with the light grey siding on my home reflecting these, I estimate I'm really a B7-B8. Also frequent cars passing by on the road behind as it is 4-lane.
Good new is I'm moving 2,000 miles away to a B4 listed area and since it is a new development, will likely be closer to a B3 site (15 miles from city lights). I will gain a lot of humidity though (moving from CO to SC) so transperency is going to be more of an issue, especially in the summer. But winters will be much milder and I will be more likely to get my gear out as the CO nights are always in the teens and twenties (F) and I won't go out under freezing.