In what sort of looks like a glorified tent, here we have a 'Nerf Double Blockade'. I've never seen these before, they just sprung out of nowhere while doing some Google searches. Looks like something only available in the UK..
Also available is the Nerf Combat Shelter...
|"After I shoot you, maybe I can tell you scary stories and toast marshmallows"|
Apologies for the broken links before, fixed now:)
Nerf Combat Shelter via Littlewoods