Ex-Gillingham winger Nicky Southall (free) is Megson's only signing so far and the ex-West Brom boss wants to strengthen with quality ahead of the new campaign.
He said: "We have got quite a few things going on but we are in the situation where deals have to suit three parties.
"They have to be good for this club, the selling club and the player himself.
"There are not too many on the Bosman list but we are not following a set pattern. We are also looking at players under contract."