Plaid Cymru are meeting in Llandudno for their first conference as a party of government.
After May's Welsh assembly election, the party entered an historic pact with Labour to govern in coalition.
It sees Plaid ministers with the economic development, rural affairs and heritage portfolios, and leader Ieuan Wyn Jones as deputy first minister.
Party leaders will stress the need to deliver election pledges, while keeping a degree of autonomy from their Labour.
Party mood
The number of delegates to attend this first post-election conference is expected to increase on previous years, reflecting the major advances the party believes it has made since May's assembly election.
Party leaders will outline their achievements in electoral terms, as well as the major challenges that lie ahead for Plaid, if they are to deliver on the promises made to the electorate in both their manifesto and the One Wales Agreement.
However, the celebrations are likely to be muted, after it emerged that a planned landmark speech by Rural Affairs Minister Elin Jones, has had to be shelved.
Ms Jones had been due to address the conference on Thursday afternoon and would have been the first minister from Plaid to do so. Following the latest foot-and-mouth outbreak, she was remaining with her departmental team in Cardiff.
Future elections
The party's parliamentary leader Elfyn Llwyd is expected to issue a challenge for the party's supporters to prepare themselves for the next general election.
But a controversial debate about the way the party selects its candidates for future elections will be held behind closed doors.
This follows complaints from some party members that a woman-first policy has denied Plaid the opportunity of having men such as honorary president Dafydd Wigley at the top of the regional lists in assembly elections.
Ieuan Wyn Jones will address delegates on Friday, when he is expected to deliver a rallying call for the party to concentrate all its efforts to make a real difference in government.
Mr Jones is also expected to make a thinly veiled criticism of the party's existing policy not to send any representatives to the House of Lords.