Anyways after getting some larger mods (Mission Mojave, Project Nevada, Electro City, and others) I realized that my game keeps crashing when entering the strip (despite loading my save already in the strip, if I leave and try to re-enter, then it crashes), but now I know that it is from a mission called Debt Collectors, and that it is a bug from giving the cowboy hat during that one (and the only way to not crash is to always have an old cowboy hat).
I think that Mission Mojave triggered something (because it is a bug patch) within that quest, because I never crashed on the Strip before when I had nothing installed.
So does anyone know of a fix for this, other than always having an old cowboy hat in my inventory?