I love gadgets too...
My #1 gadget would be my LevelMate Pro leveling system, it makes leveling our trailer a breeze...
https://www.amazon.com/LevelMatePRO-...s%2C286&sr=8-1
I also like our AP Mopeka LP tank level sensors. I did not buy the optional monitor since it's calibrated for 20lb tanks, I just use my phone app.
https://www.amazon.com/A-Products-02...KNBHRJ8JV3BWB2