As usual good advice here. One thing I would do if I were you, given that you plan to take the gramdchildren to certain State Parks in your area, is visit thosearks to ensure they have sites that can accomodate the size of rig you choose. I dont have a lot of experience but I have read that some State parks do not have the space necessaty for a larger rig. If the ones near you do then I would go for a longer rig for the extra space.
2017 Entegra Coach Anthem 44B/450 Cummins/Spartan