Tarp/Tent/Screen cover for camping with 5' bed

Hey,

I have a 5' bed with a shell. As you can see from the pic, I built a wood platform with a mattress topper for camping with my fiance. When I laid down straight, my feet stick out to the edge and I can't close the tailgate because my feet are in the way.

I want to devise a tent-like 'cover' for the back so we can be protected from bugs and stuff like that when we're laying inside the bed. I'm thinking something like a tent, where ideally you can zip up and down to access, with a mesh screen or something like that. Of course, it would have to be totally sealed up all around when the cover is on.

Any ideas or similar debacles that anyone can share would be greatly appreciated. I'm thinking of going to home depot just to buy some materials, but I'd want some tips/advice/suggestions first.

Thanks!

 

What about one of these?
Mid-Size Truck Camper Tent

$210 DAC Mid - Size Truck Tent by Dac Inc.-Vehicle Tents

https://www.amazon.com/dp/B00BYA10F4/ref=cm_sw_r_cp_apa_i_iS36CbRM5PZ97

 

On autoanything site you can see many truck tent options.
I have the same ARE shell and got a tent that hooks around the open rear and you can use as a dressing area or storage and sleep in the truck. Its still a pain to put away as they always seem to be wet in the morning when you pack up.
Another option is to go to a boat marina store and have the guys make a small one just over that window and rear area (like half of the one in the pic) with the only thing you have to figure out is how to hold the rear shell window up as the material and a hard wind will currently allow that window to slam down at times. Saw roof rails so maybe 2 straps 1 each side window to rails will work. I put stronger window lift struts on but have to be careful when opening as the window flips up fast so hold on. I also got a round foam piece of pipe insulation that's has the cut to go over the pipe to pad the bottom of the window frame so it doesn't cut the tent material - corners will.