Im going to widen my driveway myself about 6 feet bu 20 ft with conctete pavers soon to just add extra room for a car to park. There already is an excellent gradual sloape ther. Any hints before I start? Ive never done it but it seems rather eaisy. Whats an acceptible minimum for the 1st layer of rock?

Anyone thats tackled this before. Id like to hear your take on it

Thanks

Pooly