With 13 points I would hunt for a cow now (second choice) and get another couple of points and try for a Unit 61 tag. Unit 61 is good for both large elk and mule deer.
If it was a "now or never" situation I would find an outfitter in Unit 76. Unit 76 is good if you know the area, but I rarely see a true monster there. Normally a 300 inch bull is near the top for 76, but of course there are some exceptions. I have taken somewhere over a dozen bulls from 76 and only one was above 300 inches (if memory serves it measured around 330). I think there were three 6x6 bulls that were in the 290 range, but most were 5x5 or smaller bulls.