If you have a rim brake trucker you'll need to use the Rohloff long torque arm. Frankly with that and the tensioner it's a pretty ugly setup.
If you are set on a Rohloff and open to another frame consider getting one that has some sort of chain tensioning mechanism built in [EBB, sliding/swinging dropouts, etc...] and disc brakes. You can have a really clean/simple setup that way.
Given the cost/investment in using a Rohloff I'd get a frame that works really well with it vs. hacking a frame that isn't well suited to one.
+1
I don't have a Rohloff. And I love, love, love my LHT, but it has run some kind of hub gear its entire life, which means I've always had to fiddle with a chain tensioner. It's certainly not the end of the world, and I do love that bike, but considering that I never plan on not running a gear hub, it makes sense to have a frame that will more easily accommodate the hub.
When I got my frame, the LHT had a great combination of reputation and price. I didn't see a whole lot of options that sounded better, or even as good, that didn't involve spending a lot more. Now it seems like there are more options in the same price range, some of the Surlys. It's a constant temptation to change my frame, except I have a set-up that works and that I love. It just takes fiddling when adjustments are needed.
So, of course, if you already have a frame, it may not be worth the cash to change it. I feel like there are some people running that combo, and hopefully they will chime in. But otherwise I agree with Vik: If you know you're planning to use a Rohloff, you might as well get a frame that will work with less fiddling and will give you a cleaner set up.