Don't worry about doctoring the bike, hiding the bike, tarping the bike. Just don't worry.
In 1991 and 1992 I arrowed bucks out of the same tree on the same day at nearly the same time, and both were taken less than 50 yards from my truck.
In 2001 my neighbor's lesees came and parked their truck within 50 yards of my stand and started popping caps on their ML'ders in my direction. I came down and chased them, then went back out to hunt. Within an hour I had a doe and a flock of turkeys under my stand. Before I got down for good I'd had a nice buck come through.
If you have any scent concerns, park your bike a reasonable distance away from the stand and finish the trip on foot.
If you have any need to consider painting, think about Hunter Orange. The last thing you want to be mistaken for is a running deer. Additionally the last thing you want to lose is your bike. It's kind of like a camo billfold, a camo compass, or a camo flashlight. Those are the last things that you want camo'd.