Yeah got a new chain waiting to go on.
Was more worried that it (the gravel and dust) would make the chain dirty and then it will run bad for the 1500 miles there after. Would take longer to clean than it would to replace with a new chain.
Dude, just pour a bit of dry lube every now and then if you're worried about the dust.
Degrease new chain entirely to removed the wax, then pour dry lube in it, that will stop the dirt from sticking to it easily, then carry a very small bottle of dry lube.
Bring it over!
Replace chain before the ride.