I know the basics -- at least two before a change, don't put 'em too close...
... but what am I going to wish I'd brought along? I have to mark a route an hour away ... in a rental car. So I'm bringing towls and masking tape to put on the passenger side door where we'll be marking from...
And any body remember how long it takes? Besides a lot longer than I think it will? It'll be 44 miles for the 'short' and a 40 mile loop for the 'extension loop.' (Wish I could do it on the bike but... not enough time to get the car back...)

