Need advise on which new truck - 1/2 ton or 3/4 ton?

You don't need a 3/4 ton truck to pull a 7,000 lbs, 23-foot trailer. A Ford F-150 with the 3.5 ecoboost and 10 speed transmission is an excellent tow vehicle. No matter what truck you buy, make sure it has sufficient payload. If you don't understand payload rating and what it means read up here. Clicky