Check with your local Ford dealer about having a factory brake controller installed. If I remember correctly the installed prices is around $300. With the factory controller you will get the benefit of your trucks built in anti say system. The built in anti say system is not a replacement for a good WDH, but will help if you run into problems. Also, be aware of over loading your truck with other items. The load capacity on F150's range greatly and you can easily reach your trucks rated limits. Power wise you likely won't have any issues.
Enjoy the trip home.