2wd vs 4wd

naturist wrote:
Unless you plan to drag that thing through mud/snow/etc. up a hill, I wouldn't get 4WD, either.

Do be aware that there's a huge difference between 4WD and AWD. The former cannot be used on dry pavement, lest it break things in the axle. Very few vehicles offer BOTH 4WD and AWD in the same vehicle, it is usually one or the other.

That said, also note that both 4WD and AWD will only help you go when the going gets tough. Neither is any help whatever steering or stopping, which are the other two parts of driving. And are indeed more important than going.

(No doubt you've heard the joke: "If you can't go, there you are; if you can't stop, where are you?")

You're completely misinformed on most accounts here. The last 4wd transfer case that didn't act well on dry pavement in 4wd was the NP 205 in early 80s pickups. Maybe some jeeps for a few years after that. Any new or newer 4wd can be driven as far as you want in 4 wdh on dry roads, however unnecessary.
As far as 4 wd not helping in turning or stopping, you have obviously never driven in snow with 4wd so don't spout false statements. It doesn't help those more impressionable! True 4wd will not make you invincible and all the abs, traction control and stability control go a long ways towards keeping you on the road, but they are only a substitute for driven traction.
To the OP, I'm not sure why you'd consider NOT buying a 4x4 in your situation. If you were needing the best tow rig you could find on a limited budget and didn't really need 4 wd then it would be good to chop it off the must have list. For this same reason, you will lose more on resale with a 2wd than you spend on the upgrade new. But you're already buying the most expensive pickup on the market, so what's the difference.
Plus you'll look pretty goofy stuck with your travel trailer in wet grass with the baddest tow rig out there!