The Roosters completed their campaign for entry to the ultimate round with respective wins over the Merimbula-Pambula Bulldogs in both under 18s and first grade.

The Roosters were met with a cold reception from one of the biggest crowds ever at Eden's George Brown Memorial Oval on Sunday with most of those in attendance choosing to back the underdogs.

Following a heated finish to the reserve grade showdown, opening exchanges appeared almost timid, but both clubs ran through some good field position with neat football through the middle.

A bit of emotion ramped up fairly quickly though as a few bone-crunching and even lifting tackles found their way into play.

Coach Scott Barton predicted captain Ryan Apps would lead the charge ahead of time with Apps securing two first half tries to keep the Roosters level-pegged with the Bulldogs in the opening exchanges.

The Dogs had struck first with the Bulldogs attacking the fringes repeatedly.

However, the Roosters struck back within minutes, levelling the odds through a Ryan Apps surge under the posts, while Bega found the best momentum up the left edge where Todd Ingram, Jarrod Tamatea and John Parbery were building good metres.

Parbery was particularly having a strong half, before an injury saw him hobbling back to the bench at the break.

The Bulldogs second came right of the posts when half Corey Schafer found a little wig room to dash through the Bega line.

Again the reply came swiftly from the Roosters with a second Apps belter levelling it once more 12-12 with the kicks added.

Brock Seabrook caught the Bega defence napping late in the half for the Dogs to lead 18-12, but the Roosters fired back in the second half to build momentum in their favour.

An early Scott Fuller try levelled the odds once more before Fuller dived through for his second out of dummy half after Todd Ingram was pulled up just shy of the line to lead 24-18.

Bega rallied around the early points and continued to build with Fuller capping a hat-trick and Josh Shepherdson beating the Dogs' defence for a four-pointer.

A late consolation try to Adam Stone gave the Bulldogs some hope, but Fuller's third sealed the result.

Earlier, the Bega 18s had been too much for the Bulldogs, winning 54-10.

A centrepiece for the Roosters had been the goal-kicking efforts of Clay Ellison who was flawless on the day, kicking 10 from 10 despite some stiff angles and a blustery cross-ground wind.

Jordan Gray-Balcomb and fullback Bryce Philipzen had both scored doubles. The result sees Bega contest all four grand finals this Sunday.