We always rent a car. And I think in your paticular instance, it will be the best bet for many different reasons.
The signage on Disney property is very clearly marked. There are however, several times that you will be very glad to have a navigator with you in the passenger seat. As many times as we’ve been to WDW, and we drive every time, we still have at least one wrong turn or near misses. The problem being that they will have a sign telling you your exit is coming and you’ll need to turn and then that’s it. You may not have a second sign at the turn itself, which I’m used to here in RI. So if you see a sign that shows you an arrow to get into say, a right lane to turn somewhere, remember it. You may not see another sign at that turn itself.
The other thing is, AKL is at the far west side of WDW property. You’re very close to 192 where there are loads of places to eat for a fraction of the cost. You can save yourself some money by popping out there by means of the back entrance (a shortcut) to go to the grocery store, drug store, or restaurants. You’ll bypass a great deal of the traffic that way too.