If you've uncovered the area on your map, it will be marked by a small white icon with a dollar sign ($). Truthfully, I've never gotten this home invasion mission because I always hit the location as early as I can to get the Browning A5 that can be found in the cellar.
I'm trying to tell you based on the given hints. Just get on that east-to-west road on the Little Creek River's north side and ride along it, the path that leads to the cabin is marked by a dotted line and is easily found.
Alternatively, if you still can't find it, just suck it up and click the spoiler below.
Trust me, brah, there's so much hidden in this game that you practically need a guide to find some things. It's nothing to be ashamed of and no one here's going to rag on you about it. 🙂