Questions is this: Is this to much for the F150 to pull Safely? I think it is close but not sure how close
I think the payload is the weak link.
Family of 4 - total weight of family approximately 615 lbs
Comments/suggestions??
Great choice and another safe combination. Your right about the payload being the weak link as its based on a GVWR number.
Trucks don't carry weight determined by its GVWR or a GVW but carries weight buy the vehicles individual axle rating and in case of a truck pulling a trailer the RAWR as its carrying 99 percent of the weight.
I would drop by a set of scale and weigh your trucks axles weights separately. That way you know if your exceeding a axle/tire load limit.