Another Opportunity

In time, the ruffians are all routed, rounded up, or run through, and the town is free to begin its recovery. If the party was able to take care of all of the villains, they are lauded as heroes, and given a banquet when the reinforcements arrive from Aron's Bowl. If they are struggling to defeat them, have some of the reinforcements show up in time to drive the rest of them away.
Once the main force from Aron's Bowl arrives, the leaders will ask you to join them in the town hall. Arriving, you see two or three familiar faces from among the prisoners you rescued. They are the mayor, silo manager, and dock master. Together with the ward bosses they wish to meet with you to discuss the attack, your relief of the town, and the remaining threats it faces.
After the usual pleasantries of welcome and gratitude, they say the orcs have gotten too bold, and still have a lair in the mountains from which they can strike again. In fact, with their defeat, they are likely to strike again soon and with greater numbers. Given your success in liberating Garrett's Junction, they feel you are best suited to locate and follow the trail left by the orcs who invaded back to their lair in the mountains. Dockmaster Jackson raises a concern that this band was led by a fire giant, and that they may be sending you after a giant stronghold and not a lair.
The leaders will make an offer, but will listen to your concerns and be willing to negotiate a better price that will convince you to take it. They will introduce you to Imogene as a guide to help you locate the orcs' trail. If they already met Imogene, fine, otherwise, this is a good chance to introduce her with her story.
She is able to locate the orc trail and begin leading you up into the hills chasing the lead back to the source. Along the way, she will relate her story in full. While on the trail, the party may get buzzed by the red dragon, prompting Imogene to grumble that the only way to really do anything about dangers pouring out of the hills is to put the dragon out of its misery. She goes on to point out that the direction they are heading in runs straight into the dragon's territory and strengths. She insists the only way to put a stop to it would be to cut straight across the fens and overwhelm it.