I have an Outfitter Apex 8 and a black tank problem

Sounds like Oldtymeflyr has the likely source of the leak. Bob has been great about answering our questions and was able to solve our issues quickly over the phone since he knows the camper so well.

As far as getting it completely empty, just put a leveling block down on your front right tire when you pull into the dump station.

Probably won't help you now since you're on the road but you could look into getting a composting toilet and ditching the black tank completely.