Notable fact: the 5.9 has a lower tow rating than the 5.2, because it makes a lot more heat. Keep that in mind, especially in summer. The niner and the 4.0 have the same rating, 5000lbs, according to my research.
Also, Uhaul trailers are galvanized and heavy as hell. Around 1000lbs for the full car trailer as I recall. If you take that 1000lb trailer and put a car as heavy as a Camaro on it, you're not necessarily gonna have a good day. Now, if it's an older Camaro, pre-F-body, it should be fine, but if you're talking about towing a Zeta, put the other ZJ on the trailer, at least that'll look funny.
If you're doing a full move from Virginia to Arizona, you might consider renting a Uhaul truck with a trailer, loading it up, and putting whatever vehicle on the back, then using one of the Jeeps to make up the rest of the transport. This adds another vehicle, but the added vehicle is a safe tow vehicle with enough rated capacity to move most of a house while pulling a trailer. (Uhaul trucks are all equipped with OEM tow gear and Uhaul brake controllers and even the small van is a full ton van) You'll still need to tow one of the vehicles, but this way you're not using a laden Grand Cherokee to tow another car on a galvanized Uhaul trailer, cross-country, in August, without a brake controller.
1998 Grand Cherokee 5.9 Limited
2016 Wrangler Unlimited Sahara Edition
Signature rules are dumb