I've always found the Mickey and Friends lot to be pretty easy. The only time it tends to take a little longer is in the morning at park opening. It's still easy it just sometimes takes a bit longer.
If your hotel is within easy walking distance, I'd always recommend that because it's cheaper and can be quicker at park opening. But that said, it's not usually a huge difference if you drive. We've done it many times. And I actually enjoy the nice little tram ride.