Well first, you mentioned four kobolds escorting Akydon, when I mentioned in a previous post that all of them decided to retreat to the city, leaving only one. Second, The moment the wall patrol catches eye of an unsanctioned dracon, they would feather him with arrows. That's not mentioning the 5000 humans at the gate, or the imperial guard, some of which are dracon. Akydon simply won't be able to walk into the palace like that. Third, the remaining kobold is trying to get Akydon to simply go away. I get that he's supposed to be charismatic and intimidating, but if he could convince the kobold to let him into the city, why doesn't he convince Dememoras' minions to turn on their master? Finally, even if he does convince the kobold to let him into the city, he's just a scout. He doesn't have the necessary security clearance to enter the palace grounds.