Atwood water heater 10 gal

I have a 2004 Sunnybrook Titan and agree with both the high water temperature and lack of temperature control for a 10 gallon Atwood gas/electric HWH. But knowing that, water temperature can be adjusted by mixing at the sink or shower valve. Instead, my main concern is that this HWH seems to use a lot of propane when in gas mode. I thought turning it down might help, but there is no control. I suppose that using less hot water would help after the HWH shuts off, but I can see a larger, stationary propane tank in my future for home (off-grid) use to reduce trips to fill the trailer tanks. In answer to another post, I can also verify that this HWH makes a lot of noise when first turned on. But, for some reason, it is less noisy when re-heating.