Tent top will not be stealthy. Campgrounds are not very cheap. You may need a storage unit. test drive your plan; car camp, find places to stay, see how it feels.
I traveled around the US in a Honda minivan. Only paid to camp in National Parks and a few great state parks. Window covers and stealth, was never questioned at all. It was excellent. If you have a job, charge devices and a backup battery at work. Clean up at work, shower at the gym.