We were formerly participating in an Adventure's League at a local gaming shop, but had to step away for the last 2 months for personal reasons. Our situation has changed - but now the backlog of players is so high that there are 20+ individuals in the league, and we'd be put at the end of a wait list if we were to join as players again.
Fortunately, there is another route for us. My wife has been practicing online as a DM for several months, and I have years of RP experience myself (though less DMing experience than as a player). We know the system fairly well, and so we've volunteered to become DMs, and the people who run the Adventure's League have agreed to bring us on as well - with my wife taking on most of the DM responsibilities for story-telling and player guiding, and me taking on responsibility for math, stat blocks, and NPC voice acting.
We both have a single Player's Handbook and Dungeon Master's Guide. We don't have the Monster's Manual yet, but we're probably going to buy one for this very purpose. We also have some dice - about 3 sets between the two of us - though not a plethora of spare dice. And of course, we have notebooks and pencils.
What additional resources do we need to run an Adventure's League campaign as DMs, both in an official capacity and as recommended tools for DMs?