Tip what you can. When my boat ran and I kept it rack-stored, I gave the guy running the fork $20 every time I can in and told him to split it with his dock-hands that helped with my boat.
After a couple times, all I had to do was pull in the parking lot and as soon as they saw my car/truck they had me on the forks and ready to go in, alot of times in front of other people waiting. It was funny seeing the tightwads pointing and *****ing about why I was going in before them when they were there first
Same thing at the bars we go to, once you hook them up a few times, they remember who you are regardless of who's boat you're are on.