As far as the drive-train, if you have a low final drive ratio (3.73 or so?) and the towing package with the transmission cooler you should be fine.....that is a pretty hefty engine.
But there are more things to consider. Check out the GVWR (gross vehicle weight rating) of your Commander. Then add up your Commander weight, passengers, cargo, and tongue weight of the SV264 to see if that is in the GVWR of your Jeep. The SV264 is the sister ship of my SV 263, and my tongue weight is right around 800 lbs. Now, some of that would be offset by a WDH (weight distributing hitch) putting some weight back on the trailer axles, but you are still talking a 500 to 600 lb. addition to your Jeep with just the "adjusted" tongue weight alone.
If those figures come out OK, then check out the GCWR (gross combined weight rating) of your Jeep. That would be what you figured up previously, plus the projected weight of your travel trailer and gear in that. You might not carry up to the gross weight of the trailer every time, but you could use that figure as a heaviest case scenario.
Check out the stats on your hitch receiver to see if it will handle the load. There should be a sticker somewhere on that with the information.
Does the Commander have a frame, or is it uni-body? Some uni-body manufacturers do not want a WDH used when pulling a trailer. With this vehicle and trailer, you would definitely want a WDH with integrated sway control.
And since I seem to be a length policeman on this forum, check out this "suggested" chart on vehicle wheel base vs. overall maximum trailer length.
110" 20' ******* 150" 30'
114" 21' ******* 154" 31'
118" 22' ******* 158" 32'
122" 23' ******* 162" 33'
126" 24' ******* 166" 34'
130" 25' ******* 170" 35'
134" 26' ******* 174" 36'
138" 27' ******* 178" 37'
142" 28' ******* 182" 38'
146" 29' ******* 186" 39'
As you can see, there is a lot more too it than just what the figures that you gave suggest. Let us know some of these figures (GVWR, GCWR, wheelbase, hitch receiver wieghts) and maybe members can help you figure this out.