The McLaren charger IS a Ctek. As mentioned, there is a cigarette lighter plug in the frunk for charging, so you'll want that attachment. The battery is right behind that panel, where you could access it with alligator clips if you had to. Big picture, if you're driving it at least every 2-3 weeks you should never need the tender anyway. For luggage, you have a lot of space. You can easily get a carry on roller bag and a backpack in the front, the rear has quite a bit of space too. You could get several duffel bags in the back.