Oh, not so crazy...I just picked up my recent purchase of a reconditioned M105 that was in San Clemente, Ca. I had to first drive 150 mi. out ot Grandma's near the Salton Sea area to pick up my 1975 Ford F250 Crew-Cab 4X4 with the standard class 3 receiver and a borrowed max. adjustable pindle slider. I ran simple temporary magnetic trailer light kit spliced into my taillight wire. No Brake Lights or Trailer brakes. Even at max. adjustment, there was still quite a bit of an angle there. Unloaded...not an issue. I traveled nearly 200 mi. back with it, and even took the steep short-cut mtn. road that dropped nearly 6,000 feet in about 10 miles. STEEP downgrade. All with horrible brakes on that old truck...that was crazy, but controlled. Towed beautifully, and cruised no problem @ 60mph.
I have just installed a 535 gallon elipticle water tank, which fits perfectly. To addresss angle issue...I am removing the tailgate, and bolting an inverted (flipped over) class 3 receiver on TOP on the bed floor and through the TOP rails of the frame. With the adjustable pindle slider, the trailer will be level and this configuration will increase max. tongue weight a bit too. 4300 lbs. of water must ride level or tongue weight will be exceeded, especially while stopping.
Advise to get that max. adjustable pindle slider to help reduce the tongue angle and weight distribution...also +1 on the braking distance; give yourself time and room...remember: that is a ton of weight back there.