The Town boss has already brought in Jamie Cureton, Troy Brown, Matt Richards, Terry Gornell, Ashley Vincent and loanee Craig Braham-Barrett in what has been a busy close-season at Whaddon Road.
Yates is happy with his progress so far but insists there is one more deal in preparation for the new campaign.
"I am after another specific player, which will probably be a loan, and that will be it for now in terms of signings," he told the Gloucestershire Echo.
"You always want more, but I think we have to be happy with the quality I've brought in and the fans have seen some of the football we're trying to play.
"It's now all about producing it in two weeks' time against Burton at home in our first league game and beyond."