It would always be to your advantage to be ready to do it yourself.
As stated wheel chocks are a must for safety.
Also an assortment of wood blocks to drive upon so there is less jacking. Even on a flat front this will help. Also for under the jack on soft ground.
I have changed many dozens of semi and/or car tires and you will find over tightened lug nuts often so a cheater pipe to fit over a breaker bar should be carried.
Every vehicle can be a little different so you need to be ready. I had a Class A with A frame front end and I needed 2 jacks for a front tire! One for the frame and one for the A frame.
And large tire iron to "Jimmy" the tire onto the studs.