You do need to go look at it first and drive it. If you can borrow a trailer it won't cost you much more in fuel to pull it. My F250 doesn't even notice an empty trailer.
Pull it loaded in drive with OD off and empty OD on will probably be OK. If your tranny "hunts" with OD on then turn it off. Don't drive it in 2 unless you're going up a steep grade and it's got you slowed down a lot. (Or for engine braking on a steep down hill.)
Going to Edmond OK right? Should be pretty flat once you leave Denver unless you go south on I25 and go over Raton Pass. What route are you taking?
Coming from edmond ok going to wheat ridge. Had a wheel bearing go out on the trailer but still can't sleep thinking about finally getting my first bronco. Wish co was closer so I could have taken my boy with me. That many hours sitting is impossible for a li kid to sit for that long.
Still 400 miles from wheat ridge. Turning onto 270 now