Thanks for all of the input. It sounds like making up a new line is the way to go. I will confirm the fitting size at the water heater and then see if I can get the tubing locally. I imagine that if the local hardware store doesn't have it, one of the big box stores probably will. With everything on lockdown around here, I will likely have to wait a bit before going to look for the parts.
I am looking forward to not having to light the pilot each time I plan to stay in the trailer. Hope to test it out soon.
thanks again,
Nick