Hi, I'm switching to meeting planner mode here. Quick establishment of creds: was a pro mtg planner for 3 years in DC- did about 24 meetings/cons/seminars per year working for major Govt organizations and charitable research foundations, etc. Basically handled everything but programming for all meetings, including hotel selection, legal liability negotiation, contract negotiation (try getting per diem in a hot city during the peak season, sigh), all ops and set up, travel, food, entertainment (if any), publications, advertising and onsite running of the conference/seminar/etc. Have worked in most positions for SF Cons over the years. On the writing end- I've published in YA and Kid Lit, sat on panels for both, and have had workshops with kids on writing (where we actually wrote a book together). I love the field of YA/Kids Lit and that is where I want to work, so the idea of a con directed at that is wonderful.
But (you knew there was going to be one)...I think the first thing (besides thinking of a date and a place-try not to pick cities where the hotels have to use unionzed labor to set up dealers' room, art show, etc. Later you'll try to find a hotel that actually has capacity/onsite resources to do what you want to do) is to establish what you want the con to be/feel like.
Do you want panels, coffee klaatches, readings, parties, workshops, meet and greets, a chance for would-be authors to set up meetings with agents/editors, dealers' rooms, dance, film room, art show, banquets, masquerades, filk, kid's and YA programming/panels for that age bracket, etc. More partying, or more educational (ie: programming for teachers on how to use SFF in classroom, or for authors on how to get their books into the classroom, RFF, etc), more literary? Think about the feel of the event you are planning. How big do you want it to be - 100? 500? 10,000? attendees? More like World Fantasy or more like DragonCon, RWA or more like Mytheopeic dos? How do you determine who gets on paneling or readings? Who, if any will get a free membership?
These will help determine a size (of venue- hotel or convention center), budget (OMG it's going to cost what?), staffing needed, and how you advertise to fans, writers, authors, editors, dealers, artists, agents, etc. (nobody shows up and it becomes sad).
For example, will the con be open to kids and YAs as well as adults. Who will watch them if the kids are dropped of by themselves (yep, it happens). Will there be programming directed at them as well as their parents and those wanting to write YA/Kid's Lit? Will there be a kind of babysitting service for people who want to drop off their kids? Security?
What kind of price do you want to set for attendance? How many paid guests? And it goes on and on, but you need to know the answers to these questions before you start or it's like a wedding that goes from a little simple ceremony in the backyard to the event that ate NY.
Honestly, I'm not trying to discourage you. I so want this con to happen. However, I think doing the pre-organization now will save lots of time, sweat and stress in the long run? (How do you tell the meeting planner at a conference- he/she is the one with the duct tape in one pocket and the antacids in the other).
I'm on a writing deadline now, but would still be able to talk about these questions so you can set up the framework and have the event you are hoping for. I've done work (i.e. contract negotiations and other meeting planner work) for several cons pro bono, so advice comes free on this. You can contact me at bev at bevhale dot com to discuss any questions you have.