Gee posters. He had the tanks on for the past year and said so in his post. Also no one seems to think it odd that the smell is strong after sitting for a year?
Tells me the leak is very very new. Brass fittings srink when it gets cold.
First thing i would do is (once you get more propane in the tanks) is simply sung up the fittings, turn it back on and see if the smell comes back. But wait till it warms up into the 50's a few days before doing this. Give the brass time to warm back up.
Wife turned our burner half way on (by mistake of course) while putting a towel under the glass on the stove to keep it quiet as we traveled home late November. Only a 2 hour trip home and never smelled LP. Went to check on batteries a couple of weeks later while in storage and yep no LP in the tank. Filled it up at u-haul and after putting it back in storage i used my LP smell checker and sure enough i also had a slight leak by the regulator (it also got very cold the 2 weeks in storage before i came back)
Sometimes before we tear down the trailer maybe just take a deep breath and check the simple things. Were kids playing in the rv in the past month and maybe turned on a burner, etc. Because of no use for a year yet a very strong smell tells me it was a very recent event of some kind.
Jimbo