When organizing AL for a con these are aspects to consider:
1. Predicted attendance and demand. For a con running first-time AL, this is generally a guesstimate. How many people attend the con? How many will play AL? Of them, how many are new to the AL, or to D&D? (New players cannot jump into a Tier 2,3, or 4 table.) How many physical tables are available? How many sessions are needed to cover demand? (Legal table size is 3-7 players plus a DM.) What are the con norms for walk-up adds to tables, versus registered gamers – do you need to build in slack for walk-ups? How easy is it to add/remove scheduled sessions?
2. Which adventures to run? (I think you consider this to be your second-biggest question.) Consider whether you expect more new vs more experienced AL gamers. You can get all the AL PDF adventures from DMsGuild.com. Most are $3.99. The season 5 introductory adventure DDIA05 “A Great Upheaval” is free. The current release schedule (http://dndadventurersleague.
There are two paths to getting an adventure PDF for the table. The path I’d recommend is for the con to purchase the adventures, and send the PDFs to the DMs several weeks in advance. The DMs are only allowed to use those con-owned adventures for the con tables. The con must purchase one copy per simultaneous table of each adventure. The other path is to have DMs bring their own purchased adventures. That can be trouble if a DM has a last-minute issue and cannot sit the table, because the con would be lacking their content even if you find a replacement DM. Instead, the session would be canceled.
At Midwinter, for their first year with AL at a LARP-heavy con, I presented two tables throughout: first, a continuous Tier 1 table that rotated between DDIA05 “A Great Upheaval” and DDAL05-01, which are both targeted at gamers new to D&D 5ED. Second, a table running a sequence of the other 5 available Tier 1 DDAL05-X adventures, interspersed with the two available Tier 2 and the two newly-released Tier 3. I exceeded demand by a significant margin. I also tracked registrations as they came in so I could gauge demand somewhat, so in theory I could make appropriate changes. (Didn’t need to.) I will share the Midwinter plan with you this weekend.
3. Who will DM? (I think this is your biggest question.) That means both the people running the tables, and also deciding the ideal process for DMing the con. Which process for DMing? Simply, how will gaps be filled. Including initial recruiting, through handling last-minute issues (coverage or cancellation). The WotC D&D store locator is a great place to find local stores from where you can recruit DMs: http://locator.wizards.com/#br
