>>2643972If bugs are a problem you can just put your sleep setup in a hammock on the ground, keep the net off your face by running it over your trekking pole or tying it to a tree. That's what I do and you do have the option to hang when possible.
You can also look for a cheap mesh tent (aka bug "bivi"). They are more comfortable by keeping the net further away from you but also heavier and you'll still need an additional groundsheet.
You only really need a proper bivi cover when wind, or persistent wet + cold conditions are a problem which they are generally not during the hiking season meaning you can use your sleeping bag as is, and a small tarp will be enough to shield you from any inclimate weather.
Proper alpin bivis, or bivis that look like the observer
>>2644552 are generally not worth running unless you are in an alpin environment where you can't put up a tarp in bad weather due to high windspeeds. They are incredibly uncomfortable in bad weather without a tarp, and if you take a tarp you don't really need a full waterproof cover. I sold my observer, and bought a cheap goretex bivi cover to use in combination with a tarp for winter.
I often go overnighting in nature preserves like pic rel where rangers go after people at night and just use the hammock setup ... + tarp when its raining, perfectly fine and have never been caught.