Regarding the loadouts for the drones, I'm not aware of anything we can add short of sensors. Is there a default loadout to the sensor array? The one from 4E (Arsenal) sets the default vehicle array as Atmosphere Sensor, 2 cameras (front and rear), 2 laser range finders (front and rear), 2 motion sensors (front and rear), and radar (360 degree, presumably). There is no Radar in 5E, but it could be treated mechanically as 360 degree Ultrasound, using EM rather than sound waves so vulnerable and resistant to different things. Or you can pick whatever makes sense to you or let us pick a load out. The sensor loadout has no effect on cost or availability, so I'm assuming our limitation of 6 availability is for sensor modifications, such as vision magnification, etc. From that assumption, I propose the following:
Low light (1, +4, 500¥)
Vision Mag (1, +2, 250¥)
The inclusion of Vision Mag is predicated on the assumption that the drones will be flying at a reasonable altitude and so most perception rolls will be at range. However, perception doesn't have a range increment, so it is up to the GM what penalty to assess to a roll based on distance. If it is of no mechanical benefit, I could swap in Vision Enhance 1. If we are looking at some starless nights coming up, maybe Thermo would be better, but I assume that there will be some lighting. I'll have to defer to Tec on this.
Alternatively, we could schedule the physical meet during daylight and then not need to worry about lighting conditions with the exception of snow glare, making Vision Enhance 2 and Flare Comp the way to go (or VE 1, FC, and Vision Mag under the same assumptions as above).