Striker Henderson was sidelined for the 2-0 win over Leeds last time out due to a one-game ban, while defender Collins missed out against his former club with a knock.
Adams could also include Stephen Jordan in his squad following the defender's return from his loan spell at Huddersfield, but midfielder Lee Williamson's stop-start season continues as he serves the second game of a four-match suspension.
Defender Johnny Ertl is expected to miss out again due to a knee injury and Wolves striker Sam Vokes briefly returned to his parent club this week before starting a loan spell at Norwich.
Midfielder Bjorn Helge Riise is pushing for a return to the starting line-up after stepping off the substitutes' bench against Leeds, but long-term absentees Chris Morgan, Ryan France and Andy Taylor remain sidelined.
Source: PA
Source: PA