Transplanting any tree or shrub causes stress. However, both silver maple and honeylocust exhibit high tolerance to transplanting “shock”. The diameter distribution you indicated should not be a deterrent for success.
I would wait until fall (immediately after leaf drop) – this will allow needed time for additional fine-root development prior to the ground freezing. I personally prefer early spring transplanting – after the ground thaws and before the trees break dormancy. Regarding enough root ball – get an adequate tree spade to accommodate as much root system as possible based on your tree’s diameter. At minimum, I would plan for a root ball of 18-24 inches wide and 12 inches deep - the deeper and wider you go, the better off your tree will be. Remember to sever all roots prior to lifting. Experts also recommend soaking the soil with water two to three days prior to lifting.