My rural area is considered a redneck area too but I haven't had one negative incident despite my flying the rainbow flag in the front yard from time to time. My family is probably just as conservative as yours and when I publicly came out at a family reunion (with 4 pastors present),some told me I wasn't and never was a christian but that actually was a positive thing in freeing me from having to be their kind of christian.
If you are quite masculine, I dont think you have to worry about coming out. The conservative world primarily has a problem with people who are not gender specific. When you come out, they will look for feminine characterisics in you. If you dont wear a dress or lipstick you shouldnt have a problem. If you want to, long as you act tough, people shouldn't give you a hard time.
If your family goes crazy and you actually hear something that would be a good thing. What I got was hush-silence. You would think they would be a little curious but no, they dont want to think about it at all. No one in the community will tell you if they heard you are gay, you will have to ask them if you want to know what they think. But a few cousins who I expected to not have a problem didnt and voluntered their acceptance. Coming out helps identify your friends too.