So running the oil level 1/2 up or down the cross hatch is a good way to go.
Of course the "correct" way to check the oil is hot, sitting for 10 minutes, etc. I'm not saying that the half way up the crosshatch is an accurate level for checking it cold, but it's what I do. I feel that if you keep the level between that and the add mark, you should be fine. You know that you're not low, and I don't think that you'd go much, if any, above the full mark while checking the level "correctly". I once had a mechanic tell me that he checks the fluid in an automatic transmission cold and that it only expands about 1/2 quart when hot. I have not even tried to check that out. Now if he was right, then seeing that an automatic transmission in one of these trucks holds about the same or more oil in it as our engines do, then you shouldn't be over the full mark by using the 1/2 cold method of checking your oil. Again, I'm not vouching for the accuracy of any of this stuff since I haven't measured or checked any of it.