Secret agent Paul Dickov is working under cover to strengthen Rovers’ resources.
Doncaster’s boss remains hopeful of adding to his squad before today’s 5pm loan deadline.
Dickov said: “The players that we’re trying to bring in are quality - but they’re players that other clubs want to hold onto.
“We’re trying to work under the radar a bit to make sure other clubs don’t find out.
“A lot of things can happen on deadline day in a short space of time.
“We need to strengthen all the way through. We’ve got a slight imbalance at the moment with Reece [Wabara] and Mark Duffy playing on the left.
“If we saw anything at Charlton, we’re just lacking a little bit of quality and experience for this division,” he added.
“But as long we keep that five point gap [above the bottom three], we’ll take that.”
Meanwhile, Rovers are seeking to conclude takeover talks with Sequentia Capital by mid-December, chief executive Gavin Baldwin has confirmed.
Sequentia frontman Kevin Phelan was expected to meet again with Rovers representative David Blunt this week for the latest round of talks.
Baldwin said: “There is good will from the owners of DRFC to conclude the current discussions with Sequentia Capital in the near future.
“Whilst we are not putting an exact time frame on the conclusion of the talks with Sequentia Capital we have a board meeting scheduled for 17 December which will hopefully present us with a timed focus to have completed our discussions.
“We would like to reassure our loyal supporters that it is very much business as usual at Rovers and that we are working hard both off and on the field to ensure the club achieves its potential.”
Baldwin says the club are in no rush to appoint a successor to John Ryan. Blunt had been in pole position to become an interim chairman - but the lack of appointment would suggest that the protracted talks with Sequentia are close to concluding.
He said: “There are no immediate plans to appoint a chairman at Doncaster Rovers as we are giving the on-going discussions with Sequentia Capital an opportunity to crystallise.”