Forbes says the training camps have been very competitive with each player showing his strengths and putting his best foot forward to stand out.
"Being able to make this team would be a really good goal of mine achieved. Had a good year last year and achieved a few goals, but, yeah, this is the goal looking forward, to make this," Forbes says.
"It's like every kid's dream to wear the black jersey and having the opportunity to come down here and potentially make the team is a huge privilege and I'm grateful for the opportunity.
"Everyone's like top-level rugby players so it's real competitive. It's a whole other level."
The trial camp includes position-specific coaching and New Zealand U20 coach Craig Philpott said players had been working on individual programmes since their last assembly.
"This is a strong group of young athletes so as coaches we have a tough job ahead of us in selecting the squad for next month's Oceania Championship," Philpott said.
The team will be announced in early April and will assemble in Auckland in the middle of next month before departing to the Oceania champs.
The draw for June's World Rugby U20 Championship will see New Zealand come up against South Africa, Scotland and Georgia in pool play in the hope of qualifying for the play-offs. The tournament will be held over five match days across three venues from June 4-22.
BOP players selected to trial for NZ Under-20s:
Kohan Herbert
Leroy Carter
Cole Forbes
Lalomilo Lalomilo
Emoni Narawa
Dennon Robinson Barlett