We are with t37...dock lines are at the dock and set up for easy docking almost have permanent set lengths.
We have a least 8 one the boat for traveling when we take our trips to NE or even for just a simple raft up. Dont forget to carry spring lines as well as fore and aft lines.
These lines should laso be in as good condition as your regular dock lines.
Mmost gas docks already have lines as well as fenders.