My friend refers to hers as a Jack Russell Terrorist as it is quite active. The DW and I have a Golden Doodle who is the opposite.
I believe the advice about taking the dog everywhere and teaching them the limits is the correct way to go. We almost never leave our dog home or in a crate. We are part of his pack he simply wants to be part of the herd. The smarter the dog the faster they learn.
When we camp he gets a good walk every night and he stays on a lead next to us in camp. Like a small child they do not do well penned up for any length of time.
He travels in the back seat and sleeps on the TT sofa.