Rance, the spearhead of the pace attack, is battling a sore shoulder while wicketkeeper Childs took a hefty blow on a finger at Paraparaumu.
Selector-coach Mark Brown and his assistant, Brian James, planned to name the 12 players to travel to Hamilton after training last night and, providing Rance and Childs are both passed fit, the big poser for them will be who from the side which took the field against Horowhenua-Kapiti makes way for Van Deventer.
And they will also need to take into account that whereas all 12 players are able to be given match time during qualifying games - a bowler can be left out of the batting line-up but still bowl - the 11 who start in Hamilton will be involved for the full three days.
No matter what the final composition of his side, Brown is confident Wairarapa will give a strong account of themselves against a Hamilton team whose powerful batting order could be strengthened by the inclusion of Black Cap BJ Watling.
"You don't get as far as we've got without being a very good side, we've got every reason to believe we can come up trumps again," he said, adding that with the Hawke Cup able to be won on the first innings a good start would be vital to the Wairarapa cause.
"You have to hit your straps early, that's very important."