TentCheck

REI Co-op Wonderland 4

Floor 100 × 100 in, 75 in peak, no vestibule. Drawn to scale from the maker's listing; the grid is 6 in.

Which pads fit

4 regular padsFits

An inch or more to every wall. Sit-up room +36.4 in.

A queen air mattressFits

An inch or more to every wall. Sit-up room +30 in.

Two queen air mattressesDoesn't fit

They don't fit side by side: 10 in past the wall.

Two camp cotsFits

An inch or more to every wall. Sit-up room +22.6 in.

Pads side by side at their listed sizes, with the average man (5 ft 9 in) lying on each. "Tight" is under an inch to a wall or the sloping roof: the fabric gives, but a wet wall wets what touches it. Open it in TentCheck to try your own pads, cots and gear, or read how fits are checked.

Where two queen air mattresses fit instead

The lightest car camping tents where they fit with an inch to every wall.

Check every car camping tent for two queen air mattresses

Headroom

Roof overheadFloorShare
Anywhere69.4 sq ft100%
12 in or more69.4 sq ft100%
24 in or more69.1 sq ft99%
36 in or more66.6 sq ft96%

From the modeled roof, not measured. About 36 in is where an average adult sits up straight on a pad: a 35 in sitting height, plus the pad.

The numbers

Floor (listed)100 × 100 in, 69.4 sq ft
Floor (measured)99 × 99 in (Switchback Travel, measured at the corners)
Peak75 in (6 ft 3 in)
VestibulesNone
Sleeps (maker)4
Packed weight347 oz (21 lb 11 oz)
Packed volume59.3 L
Regular pads that fit4 with an inch to every wall
Sit-up room on a pad, at the peak+39 in for 35 in sitting height
Standing room34.5 sq ft at 5 ft 9 in, 46.1 sq ft at 5 ft 3.5 in
Pitched footprint100 × 100 in (8 ft 4 in × 8 ft 4 in), floor and vestibules
Groundsheet to cutAbout 98 × 98 in

On the campsite

Floor and vestibules together cover 100 × 100 in. On a square tent pad, as campgrounds list them: 8 × 8 ft: doesn't fit; 10 × 10 ft: fits; 12 × 12 ft: fits. Guylines and stakes need more room around that.

For a groundsheet, cut it a little smaller than the floor, about 2 in, so rain running off the fly doesn't collect on it and run under the tent: about 98 × 98 in.

Notes

Floor 100 × 100 in with a 75 in peak and near-vertical walls. No vestibule comes with it, so packs and gear ride inside. REI no longer sells it; these numbers come from reviews of REI's listing.

Sources

Roof shapes are modeled from the floor, the peak and how the poles hold the walls, not measured. Treat a result within an inch or two as too close to call.