Just wanted to say thanks for sharing the info on difficulties in filling the fresh water tank. I am a new member to the forum, and probably would not have bothered with joining except that I also have a 2011 Bighorn 3070RL and just after the warranty expired I found that I could not fill the fresh water tank. I was going to drop the underbelly and fix it properly, but found I would have to disassemble the propane manifold to drop the underbelly. Too much work. I read this thread and then put a flexible length of power cord down the fill hose and found after about 6 or 7 feet there was a turn the cord would not negotiate and the end came out wet, so I figured I must have a low point that was filling with water and sealing up the fill hose. I applied air pressure to the vent hose and blew water out of the fill hose all over me. I followed the suggestion about going to Walmart and buying a $7 fresh water hose, cut off the male end and inserted it about 6 feet or so and was able to get water to go into the tank. Of course, this is not as good as having the hose routed correctly, but it allows me to fill the tank without having to drop the underbelly. Wish Heartland had paid attention several years ago when these issues surfaced and corrected it then. The UDC is a nice thing, but they could have put a separate fill for the fresh water tank right over the tank and it would have been a better fix. Anyway, I wanted to thank those of you who had posted your fixes and it encouraged me to join the forum. I had previously owned SOB camper and they had a forum through which I met some great people who knew a lot more about their trailers than I did, and I know I will have the same experience here (as I just did), so thanks and I look forward to maybe being able to help some of you sometime.