If your considering a 1/2 ton truck I would go with a V-8 at a minimum, and have the truck configured such that you get the maximum Payload Capacity along with the HD Tow Package option offered.
The 1/2 ton truck will be more then capable for towing your Jayco 1007 under the conditions you described, but at least you want to have some additional Payload Capacity available should you decide to up-grade to a bigger trailer in the future.
Please note, TV Payload Capacity is important with heavier trailers because a trailer's loaded tongue weight is subtracted from the TV's Payload Capacity. The Tow Ratings of 1/2 ton trucks are attractive, but it's the Payload Capacities that are the first to be used up be a trailer.
Hope this helps.
2016 GM 2500HD 6.0L/4.10
2005 Jayco Eagle 278FBS
Reese HP Dual Cam
Putnam Class V