The basics for a first night: what Camp Mode does, how to set up the bed, and which mattress to start with.
Every Tesla has Camp Mode, which keeps the climate and power on overnight and draws on the battery, so arrive with charge to spare. Fold the rear seats down, add a mattress, and add window covers. The top score of the 19 is the Snuuzu Model Y; the Best affordable pick is the NovaPads Air-Foam Pro.
The highest Comfort score of the 19 (9.7): comfort foam over a pressurised air layer, with a built-in USB-C pump that inflates it in about 2 minutes. It also has the highest price of the 19, and no sleep trial.
The highest score between $300 and $600, in Model Y and Model 3 versions. Comes with a fitted sheet, a cordless USB-C pump and a carry case. Shades are sold separately, sale items cannot be refunded, and no warranty is published.
The highest score under $300: air and foam combined, with a built-in 12V pump and a fitted sheet. Made for the Model Y. 1-year warranty, and NovaPads' own FAQ says about 6-7° of slope remains.