Orbiting will in more cases slow you down when you want to warp off than it will help you.
Keeping at range of 2300m is what I would recommend for the following reasons:
- Keeps you in looting range
- Still able to cloak when something scary happens
- Cloaking up will stop an initial lock of a hunter - if done quick enough
- You won’t bump into the can when trying to warp or move to the next can
About the drones:
If you are out for non-combat exploration you look for data and relic sites for which you will not need any kind of drone. Drones are a weapon system. And if you sit in a Probe, you most of the time don’t want to fight - unless you know what you are doing and explicitly have your ship fitted for pvp purposes.
Drones that might help you to escape an ambush are EC-300 Hornets. They can jam a hostile ship, so it won’t be able to lock you for a short while and enabling you to warp away. But it will likely require good reflexes in order to pull this off as your ships has little ehp and may die quickly.
But if you should find a T2 Covert Ops frigate in any other space than highsec in a site, you would want to have at least a few combat drones with you. This will enable you to force the other pilot out of the site. The T2 variant of the exploration frigates have extremely low combat capabilities. Those and maybe Interceptors fitted for exploration are the only ships you could engage and hope to successfully fight with drones from a Probe.
But be aware that they also might reship and come back, or have friends.