That’s 100% a non issue in Wyoming. No antelope hunter worth a darn leaves their spotting scope and binoculars at home. Make sure to bring a window mount for the spotting scope, and better is one spotting scope for each side of the vehicle. Litterally, all year long I’ll glass every decent buck.
There’s a lot of open country in Wyoming and locals pull over where ever they feel like it. If they are assholes they may stop behind you and glass for whatever you’re looking at and shoot it before you do if you dittle around. Nothing is illegal about pulling over, crossing the fence on foot and putting the smack on a critter, but personally I’d stop glassing and pretend to be peeing or picking my nose until any vehicles pass. Many big antelope have been shot by a guy in a geo metro glassing from the blacktop shoulder until a big one is spotted in a huntable spot.
I hate to sound like a broken record, but if you see a big buck from the road don’t be surprised if a quick thinking kid pulls up behind you, jumps the fence and uses his Rokslide special to take it out at 1200 yards. Combat hunting applies to many things, especially antelope. Lol