conversion kit

A'int really a conversion .You need a extra tank , a mounting platform , and a switchover regulator . Easy job , might need a drill motor and some screws . Can get at E-Trailer , Amazon , E-bay or any RV place .

Agree with wanderingbob. Other than physically mounting the two tanks on the trailer, all you need is a decent auto-changeover regulator. I particularly like the Cavagna Kosan 924N RV Auto Changeover Regulator w/RV 'L' Bracket

Cavagna

Planned on doing the same. After pricing the parts and looking at the labor, I found a cheaper, simpler method to have more propane.
I swapped my 20# tank for a 30# tank. Only the cost of the tank and a fill. Same as having the 20# tank but taller. Considered the 40# tank but that would be top heavy in the existing bracket. For extended travel, I’ll throw the old 20# on my rear carrier.
Empty propane tanks decently priced at tractorsupply.com and had free shipping, mailed to my home. My local Tractor Supply has a propane tank fill station, so you only pay for gas received. Only minor PITA is the 30# tank is taller than my truck tonneau cover, so I braced it in my back seat floor area.
So bottom line, gained 50% more attached propane for well under $100 with no labor.
I think having a few of those 5# tanks would be great for a backup if you run out but those suckers are $$ for what you get.

Was said : Only minor PITA is the 30# tank is taller than my truck tonneau cover, so I braced it in my back seat floor area.

You carry a 30 pound tank of propane inside your vehicle?

Why not travel with the 30# tank on the trailer tongue where the 20# was mounted?

I may be wrong, but I took it to mean when he dismounted it and carried it to be refilled.

klutchdust wrote:
Was said : Only minor PITA is the 30# tank is taller than my truck tonneau cover, so I braced it in my back seat floor area.

You carry a 30 pound tank of propane inside your vehicle?

I do that every time I fill my tanks. I have a Suburban and a Bronco and various cars. I either put the tank inside for the trip to and from the refilling or I can walk and carry it on my back. Yep gonna put it in the vehicle and not worry about it. We all take calculated risks every day. This is just one more of them.

Yes, for the initial tank fill.
Carrying a 30 pound tank inside is different only in scale to bringing one pound tanks for the small outdoor stove or lamps.