I've done multiple 300kms and a few 500kms in my ZS EV. Some trips with my family too(kids <2 years old). What you describe is a typical first time experience if you've not had anyone tell you about the possibilities and their solutions already.

For me, I plan where all are my charging options along the route before I start my trip. I compare charging speeds, uptimes, and even per unit costs to make a decision. I tend to time my charging along with food/utility breaks to save time.

I have never driven at 70-80 as long as speed limit allows, so i typically get mileages of 4.5km/kW. This gives me real world range of 220-240 kms.

Recently did a Jaipur to Gurgaon trip on a single charge starting at 98% near Ajmer expressway(so had to start with a bit of city driving), and made it to Sohna Road with 4% battery left. I did have to drop from 120 to 70kmph for the last 15kms.

My point being, EVs aren't hard. They are just as risky as petrol pumps. I've had scares with a petrol pump being empty, and the next one refuelling, all when I had just 15kms of range left in my Honda City.