The 32-goal hitman has attracted interest from a host of clubs in recent weeks but the Robins have already rejected two bids from unnamed sides.
"The last thing I said to Simon before he went away was to be prepared for pre-season here because I've got some special runs for him," Wilson told the Gazette and Herald. "So if he comes back then fantastic.
"Simon's got a very level head on him and is not pushing one way or the other. He just wants to be kept informed of everything that is happening and we do that.
"The chairman has been fantastic with him - they have a very good working relationship. It is trustworthy between the three of us and there's no reason why it shouldn't be.
"They [other clubs] will assess what is happening and wait till the very last minute to see who is available and see whether someone is going to jump in before someone else. But who knows, Simon may be here come the start of the season."