Gear up from Winthrop, head straight to the south of town, do the party combat training right away.
[spoiler]One of the temporary party members has a Potion of Speed. You can't take it with you, but if you quaff it while you're in the combat training, it will remain effective even after you leave the training. Do the rest of the quests from there before heading off with Gorion. The effects will disappear on leaving Candlekeep though. [/spoiler]
[spoiler]One of the temporary party members has a Potion of Speed. You can't take it with you, but if you quaff it while you're in the combat training, it will remain effective even after you leave the training. Do the rest of the quests from there before heading off with Gorion. The effects will disappear on leaving Candlekeep though. [/spoiler]