Exiting Irenicus Dungeon, Yoshimo/Kachiko/TS Tie-ins Options

[erebusant]

Ok, I finally got teleported back to Irenicus Dungeon from the Astrolabe, with my party intact and had a question regarding getting Yoshimo and Kachiko to join to be able to do the TS quests later. My understanding is you need Yoshimo to get Kachiko to even appear, however I don't have room for him to join. What is the best way to kick off the TS dialogues for later? I'm thinking of joining Yoshimo, and kicking Minsc out and have him go to "a nearest tavern or inn" (which does he go to, CC?) and then when Kachiko shows up, not allow her to join and have Yoshimo leave and give dialogue to meet at the Sea's Bounty. Will this leave the future TS content intact and questable? Thanks!!