Will second this take. When I put close to 3ft of 5/8 over 5/8 wave on my truck I figured it'd be easy to see from a distance, but not so much, it gets lost in the background unless you're right there.
My current base setup is indoors, 5/8 wave whip mag mounted on sheet metal and a btech for gmrs, with a comet gp1 and a dual band icom for 2m/70cm...was hoping to run gmrs on that too with (separate 70cm/gmrs and 2m radios), but swr was too high on gmrs ( 2.5-3:1 ) on the comet. Uhf radio went to the truck for 70cm/gmrs instead, with that browning on a mag mount. while mounting outdoors will definitely help, especially simplex, both work fine for repeater work, multiple machines within ~30 miles on mid power on 2m and 70cm, and 30 and 60 miles out on high on gmrs