You can do quite a lot with that kind of truck in the Swell. The very end of this trip is about the only part you would want to avoid (it was a narrow shelf road).
If you have a free day, drive down to I-70 and take the Temple Mtn Road exit (134?) and drive north on Buckhorn Wash Rd to Huntington. That's a great introduction to the Swell, and it does not get any easier.
Thanks for the direction. I can do reasonably difficult stuff in the truck - for example we did Klondike Bluffs all the way into the park last fall including the nasty tight drop into the sandy valley at the end. I was not comfortable doing it, and scraped the skidplates a bunch of times. So, a little easier than that would be good. The big weakness is the breakover angle due to the wheelbase, and the turning radius. 130"+ wheelbase on stock height is a challenge for sure. My concern is, I'm likely to get bored if the trails are too easy. Driving some challenging obstacles is a big part of the fun for me, but it's also not a truck I can scrape up either.
Is the width of the shelf road the real challenge? Full size width and long wheelbase isn't ideal for narrow trails with sharp turns.