Reflective guylines! Gossamer Gear EZC2 or Kelty TripTease (heavier) are great! (Also Lawson Equipment Dyneema Ironwire, which I forgot.) Shine your headlamp towards your tent and you can see the reflective guylines clear across a big meadow! Yet in daylight they aren't all that visible.

I prefer to get way off the trail (like a quarter mile), but sometimes there's no choice but to camp close, even where it's illegal--especially in the Rockies where the only other choice is under beetle-killed trees ready to come down.