Used the heat tape last winter--once I understood it had to be taped/tied to the hose in short lengths, it worked fine. Wrapped one end around the faucet and covered it.
Also, no matter what the mfg said, an extension hose of 10 ga should have no problem handling the draw from the tape--
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired