The vast majority of Tilson's squad are already contracted to the club beyond the summer with only a few yet to resolve their futures.
With the club building a new stadium, finances are tight and Tilson admits funds for new additions will be restricted.
"There are only a few - Peter Clarke, Ian Joyce and a few of the younger lads - that are out of contract so there won't be a lot of comings and goings - but hopefully there will be a few coming in," he told the club's official website.
"Most people have signed for next year so there shouldn't be loads of activity like last year.
"We will have to weigh up the situation and see what we need. At the moment it is difficult out there for any club with the credit crunch and we are trying to build a new stadium, so it's difficult."