The Victory 10 can indeed fit in the back of a minivan or SUV. Depending on the exact vehicle model, you may or may not have to disassemble the
scooter.
It should be noted that while the Victory 10 does come apart generally, not every rental company sets them up to be able to be disassembled, so whomever you rent through, call and confirm.
Gold Mobilitys can be disassembled, if you go with a Victory 10 from them, call and ask if you can get a red model, as they were able to find larger batteries to put in their red ones and that should work better for you.
And they are officially rated for 400.lbs, but can handle heavier, just know the battery will die faster.
The Maxima does not come apart, but in general can fit in the back of a minivan or SUV, if you have at least three people to lift it. Best if you can put the back rowndown for this one. And yes, Gold rents this one, but you have to call.
There are also portable ramps on
Amazon for about $150 thst you could have delivered to your resort, use and leave behind if necessary. You would just put the scooter in neutral.