"We are certainly keen to be playing in the Bay of Plenty and unfortunately Baypark is just not up to scratch for a lot of reasons. Rotorua is a great stadium, outstanding field and we are really looking forward to playing there."
The early arrival into the Chiefs training camp of Williams caused most of the attention at yesterday's media session.
Rennie says Williams showed what a top-class professional he was by coming into camp weeks earlier than he had to.
"The All Blacks aren't due in until January 26 but Sonny Bill was keen to come in for a week. He did a PB on the yoyo of 20.1 so he has come in really good nick. That is pretty good for a man who is 106 kilos.
"He has made a positive influence. He is not saying too much or doing too much at this stage. He is trying to get his head around things and get to know some of the boys new to the group."
Rennie has recruited some of the biggest midfielders in Super Rugby in Williams, Seta Tamanivalu and Charlie Ngatai.
"We have a tad bigger backline than we have had in last couple of years so it is pretty exciting," Rennie said.
"Having that size gives us a bit of variety and we can play different sorts of strikes. Around those big men, it is good having the fast men as well so we have some good combinations."
-Chiefs home fixtures:
February 20: Chiefs v Brumbies, Yarrow Stadium, New Plymouth 7.35pm.
February 28: Chiefs v Crusaders, Waikato Stadium, Hamilton 7.35pm.
March 6: Chiefs v Highlanders, Waikato Stadium, Hamilton 7.35pm.
March 28: Chiefs v Cheetahs, Waikato Stadium, Hamilton 4.30pm
April 4: Chiefs v Blues, Waikato Stadium, Hamilton 7.35pm.
April 24: Chiefs v Force, Waikato Stadium, Hamilton 7.35pm.
May 22: Chiefs v Bulls, Rotorua International Stadium 7.35pm.
June 13: Chiefs v Hurricanes, Yarrow Stadium, New Plymouth 7.35pm.