As far as the driving part...NO, no regrets. As Ensty put it, there are days that you will hate it,and many days that you just love it! Attitude plays the biggest part. A, "This too will pass" attitude on those bad days will help.I have seen a lot of this great country, met some of the best people and had some great experiences, that I will NEVER regret.
On the other hand, you asked if there was anything I WOULD change..YES. When you are young,and BIG,like myself , you have the impression that you can do anything. Especially lift and handle anything.With no thought as to how your body pays for that were and tear as you get older. Sooo... in short don't think that because you are young and strong that you can do anything. You don't have to show off for anyone.
I don't know if this is coming out clear to you so i'll try and clarify.
DON'T use yourself as a human crane and try and show off by moving equipment and lifting heavy loads by yourself (just because you can, or just don't want to wait,or ask, for help) all the time.
If I hadn't done that I would probably not be in the position I am in now with these bad knees.
You have got to look out for your health, Sean. When it goes, it's NOT fun anymore!
Just take this as a bit of very honest advice, from one who's been there.
I wish you the VERY best of luck! It is definetely an experience, and , most assuredly "what you make of it".