We never had a toad and would just rent a car if we needed to go someplace and that was at most once a year. We also took tours instead of driving. We camp hosted for the first time last year and there were no car rental available for our location so this year we will be towing with a Acme tow dolly with surge brakes and a Hitch it Safe on the hitch.
As far as your Fit not being able to tow four down I have read here on the forum that the Honda CRV's after a certain year per Honda are not towable 4 down but apparently that is only to release Honda from liability and people are still towing 4 down newer CRV's following the "old" towing procedure. I would check to see if the applies to your Fit.