Consider helping your slow-to-adapt child succeed by staying in one place, if possible, and enjoying those surroundings. For example, rent a cottage for a week or two so you minimize changes and new experiences don’t come at him too fast. Or move no more than every 3-4 days to keep change at a minimum. Being by a lake or a pool may be a good way to keep your child happy for hours.
Camping is another nice family adventure and is a low-cost way to settle in and have some fun.