Truck Bed Tents

I used one once on my Tacoma (I bought it for a specific event and haven't had an opportunity to use it again). It worked fine, but we didn't experience any rain or adverse weather. Admittedly, its more work to set up (especially in poor weather). Other than that I'm not sure what the major advantages of a roof/bed top tent (except that you don't lose your bed storage.

Comparing the Rivian's bed dimensions to the tacoma (short bed):

Width: 51.1" (Rivian) vs 52.5" (Tacoma)
Lenght (tailgate up): 54.1" (Rivian) vs 60.5" (Tacoma)
Length (tailgate down): 83.9" (Rivian) vs 80" (Tacoma)
Height : 18.3" (Rivian) vs 19" (Tacoma)

I haven't taken these measurements myself but found them on the 'net but it gives you an idea. They measure pretty close except for the open bed. The same tent you use for the tacoma might work on the rivian. I just can't remember if there is enough give to accommodate the extra 3".

If you can wait until the third quarter of 2023 (when I'm scheduled to get my Rivian), I'll let you know.
Otherwise, wait until ridgeline makes one specific to the Rivian which they totally should. It would be an awesome alternate.

Hey all I wanted to give a report on the first night in a Rivian camping with a truck tent. I bought this from Cabelas/Bass Pro for $309
Compact 6' fits the width well, and it pokes over the end of the bed with about 6". The compact short may have not used the full bed, but I might return it and try the short instead. (only the regular size was available same-day)

It was by far the most complex tent I have ever set up. The reviews don't lie. You can do it as one person in 30 minutes if you have experience with tents. It requires a specific order, and make sure you set it up on the ground as instructed or you will scratch your truck.

The aerobed queen size from costco fits perfect. Only down side is it makes it hard to get into the bed. Small kids need to be lifted. Teenagers can scramble in.

Best part of it however is the aeorbed fits perfectly with the height of the bed sides, so you can actually sleep on the sides of the truck bed sides and its comfortable.

The field kit proved useful on its first trip. The included first aid kit just has trauma stuff, but if you want band-aids for booboos, the field kit had it. add your own ointments.

The constant locking and unlocking was really annoying until i figured out camp mode. it is still really complex to figure out (and i'm an engineer). If you don't enjoy puzzles and creative problem solving, don't get a Rivian.

Final conclusion is I think I will keep the truck bed until Rivian releases the full yakima and camp kitchen. The loss of bed space was inconvenient, and you are still climbing up into the bed. A ladder would make it easier.