Well, I'd work out the velocity the snail travels at, how often it needs a rest, and the furthest possible point I could get from it. Id let it get close, then travel to my destination. I'd stay there until with 5 mins of its arrival, then repeat trick.
Id probably do this for 5 years before Everton ground me down. I think I'd let the snail get me at this point.
All of the above is contigent on it being an otherwise normal snail and not some kind of DCU/MCU supersnail with Thanos powers.