He said in any event meetings of the trust were nowhere near as frequent as those district councillors had to attend.
Mr Montgomerie said his single term as a district councillor had been "a positive experience" and he had been involved in many projects.
Unlikely to seek re-election is veteran councillor Max Stevens, whose council tenure - although broken into two periods - has been far longer than any other councillor.
Mr Stevens said he "probably will not" stand again.
The former deputy mayor, who served in that capacity under inaugural district council mayor John Garrity, has chalked up a total of 21 years on council.
His first stint was 12 years and he later returned for another nine years.
Mr Stevens has served under all three mayors, being Mr Garrity, John Read and Adrienne Staples.
"I feel I am getting too old for it, I have done my bit for the council and it is good to have younger people who bring energy and fresh ideas with them," he said.
Mr Stevens is one of the council's appointees to Martinborough Community Board and his departure would create a vacancy there also.
Among the "undecideds" are mayor Adrienne Staples, who would have been in the top job for 12 years by election time and who said, "at this stage I am not sure if I will seek re-election".
Margaret Craig, a Greytown ward councillor, likewise has not made a firm decision.
She said she is "awaiting with interest" the final outcome of the local governance issue which may have a bearing on her future decisions, her own preference being for the uniting of the three district councils within Wairarapa.
Mrs Craig is a three-term councillor.
Likewise three-term councillor Julie Riddell is undecided, as is Brian Jephson who said he is probably going to put his name forward again but has not reached a firm decision.
Mrs Riddell now lives in rural Masterton but the family retains land in Martinborough.
She said the three terms she has served on council have all been very busy "but we have achieved a lot. The council has come a long way".
Mr Jephson, completing his second term on council, lives on the South Wairarapa coast and runs Palliser Bay Station.
He said the time commitment was a big factor for him with the "round trip" to attend meetings taking an hour and a half.
As the council's coastal watchdog, Mr Jephson said a lot of improvements have been made in conjunction with the Ngawi Ratepayers Association but that the road to the coast is getting busier every year.
Deputy mayor Viv Napier said she "honestly hadn't even thought about" the October elections, having been heavily involved with other issues just lately.
Mrs Napier will have served 15 years on council when the next ballot is held.
Three councillors who are definitely seeking re-election are Colin Olds, Dean Davies and Solitaire Robertson, all of whom are Featherston ward councillors.
Mr Olds, who has been on council for a single term, said from his viewpoint there is unfinished business to be done and he wants to see some projects through to their fruition.
These include the Featherston Town Centre project, Wairarapa Moana wetlands projects and Whaitua committee work.
Mr Davies will be seeking a fourth term and has a special interest in the local governance issue.
He describes the merger of the three district councils as being "the sensible option".
If re-elected Mr Davies will continue to represent Featherston although he has moved house to rural Carterton.
"I grew up in Carterton but I lived for 20 years in Featherston."
Ms Robertson joined the council in 2007 when she was 26, being the youngest councillor in the chamber.
Nearly nine years on she said she is still enjoying the role and feels she still has plenty to offer.
"If I thought for a moment that I had nothing further to offer and had lost enthusiasm then I would not stand," she said.
