Keinzley says his side will measure up to their opposition in at least one area, enthusiasm, but he agrees Wellington are likely to have the edge on them in a technical sense.
"We've got a really good group of young guys who will try hard but most of them are still very much at the learning stage of their careers."
With Wellington certain to place the emphasis on attack, Heartland Wairarapa's defensive structure is sure to be placed under the microscope on a regular basis and, consequently, it has been the centre of attention at training sessions.
"The big thing for us is to retain possession, the longer the better," Keinzley said. "Giving ball away will be a no-no against a team like Wellington. They'll come at us from everywhere if we keep doing that."
It will also be important the link between the Heartland Wairarapa midfield and strikers allows the latter to place their own form of pressure on the Wellington defence. Playing a key role there will be Pedro Garcia, the Upper Hutt Central League player-coach who will be one of the two allowed over-age players in the Wairarapa side. Thomas Hemi, a regular in Wairarapa United's Central League squad last season, is the other.
Keinzley believes there is enough strike power in the Heartland Wairarapa forward line to trouble Wellington, provided the service given them is up to scratch.
"It's all about the midfielders taking the right options. If they can give the forwards the chance to run on to the ball at speed then the goals will come."
All teams contesting the 2014 national youth league will wear black armbands tomorrow in memory of Miroslav Tvaroh, the Heartland Wairarapa coach who died tragically at Castlepoint late last month. There will also be a minute's silence before each of the games. Kick-off at Memorial Park is at 2pm.