Wolfenden, 21, came through the ranks at Bournemouth and has also been at Tottenham.
He was recommended to boss John McGrath and has been offered a deal after impressing in training.
Yadolhi, 25, has played in Turkey, Ireland, Iran and in the MLS for Vancouver Whitecaps.
He played for Ireland at all youth levels up to Under 21s, and has played for the Iran and Iraq national senior teams.
Both go in to the squad for this Saturday's game at home to Whitby Town.
Keep up-to-date with our exclusive email newsletters.
Subscribe