How much tread wear difference? If the oddball is close, I mean within 2-3/32 close, you should be fine, but if the load and tire pressure ratings aren't the same as the nittos, I'd run it on the front. Pulling a camper, you're better off with the matched pair on the back.
If the tread depth is not close, buy another tire or only mount two. Even 4-5/32 difference in tread wear has been known to cause ABS and auto 4x4 issues with ford vehicles especially as new as yours is. I am speaking as a former ford tech, with experience having to explain this exact situation to customers as why they needed all 4 tires when two were "still good".
Even mounting just two may still cause issues, but possibly less then just one oddball. Or you could just pull the ABS fuse......
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