Interesting question but more info required, I think.
Where is the drone going to be kept on the pad? In some kind of hangar facility, in the back of a news van, or is that just a figure of speach and it's on a shelf ready to go? You definitely do not want any possibility of rain getting onto the drone while it's waiting to go. That implies some kind of door, and you'll also need enough vertical clearance for takeoff. Cold will also kill batteries, stored or not, so you're going to need to think about the storage environment for both drone and spare batteries.
How do you plan on bringing the pilot into play? Grab the RC and run to the pad for pre-flight? (You really don't want to do a remote pre-flight in case there is a problem with the drone).
What's your likely usage pattern? Can the pilot power on the drone immediately before flight (see point 2), or do you mean to have it powered up on the pad? The latter means some battery drain, so you're going to need to figure out how long you can leave it sat there before the remaining charge drops below useful levels. I'd guess a few hours since the rotors are off, but that's still going to be brutal on battery recharge cycles and wear. For protection, DJI also drains batteries to 50% charge if they've been sat on the shelf for more than 10 days; so you'll need to factor that into your battery management plan as well. You'll also need to figure out how to keep the RC charged.
Personally, if I were attempting this, I'd probably have the drone and RC stored in a warm and dry environment ready for flight but powered off, and have a launch pad painted on a suitable surface nearby or a bit of rigid board if you're mobile. Have a bunch of batteries, try and cycle through them in sequence, and minimise the recharges. How that will look, and how many batteries you'll want to ensure you already have enough fully charged ones will depend on how much flight time you need, but shouldn't be too hard to figure out.