I think remote activators just have a 'Home' button, so that'd presumably be a bit easier. Suppose it'd mean you'd get flak from the Flowers for coming back before the mission ended, but better than getting into too much trouble, aye? 'Sides, the Agent(s) concerned wouldn't have to deal with getting the characters in the Goodfic's trust, and I reckon there might well be a better chance of finding someone who knows the things to do to help out. Although might not be Agents know how to stop, say, blood flowing from a wound. Is first-aid part of training these days?

Sort of relevant query: what of asking canons, if they're together enough?

Though I think the more likely solution would be to contact HQ and get another agent, a friend, to come and help instead.

That said, the biggest problem of using Goodfic characters... hang on - are we talking about canons or Goodfic OCs? Because the latter would be BRILLIANT - especially if it's a well-known goodfic. If you mean canons from a Goodfic (or simply from Canon itself), the biggest problem I see would be having two running around at once and possibly being mixed up.