Just a caution to be aware of (never happened to me or anyone I've directly met, but has been talked about on the irv2 forums with some saying it has happened to them)...
Assuming you have a 45' Essex, the shortest Escalade is just shy of 17' long. If you've got the ESV/EXT it's closer to 18.5' long. You're looking at 62'-63.5' without
the tow bar. Most states limit the combined length of coach + towed to 65'. Source:Trailer Dimensions | AAA/CAA Digest of Motor Laws
. Some are significantly shorter than that with 53', 55' or 60' not being uncommon.
If you are over length you'll likely never get a ticket, but you could. I'm not sure what, if any, ramifications would occur if you are involved in an accident and over length. Also not sure if coach insurance and/or an umbrella policy would be able to wiggle out of any coverages.
On the pragmatic side - depending on where you head, it can be hard to find a space to comfortably accommodate 45' ... let alone a full size vehicle
I know we had problems in our trip earlier this year with having to park quite funny many times and have very little "site" left over.