She said they loved riding down the Clive River and didn't want to move somewhere else.
"It is such a safe place to ride as there is not many people around and it is one of the only rivers with a long straight."
Low tide added to this pressure of providing waka rides for tourists.
"My goodness me, it is worrying. I thought the mud was weed when it was low tide the other day."
Mrs Edwards said the couple weren't able to choose the times for cruise-ship passengers, which meant they couldn't work to the tides.
"If we cannot carry out the contractual agreements with the cruise ships we may have no choice but to move."
The Edwards join forces with Matahiwi Marae to provide a true cultural experience but last year things got interrupted because of the difficult riding conditions.
"We had to wait for the tide so instead of one half coming to us first then to the marae we had them all at once. We only have enough seats for one group at a time so it meant the others had to just wait and watch. It wasn't good."
The Hawke's Bay Regional Council dredges the river but Mrs Edwards was told the next dredging was five years away.
The waka also play a big part in Waitangi Day celebrations and Mrs Edwards is scared they may have to shift the celebrations somewhere else.
"We have been told low tide for Waitangi Day is about 7am so we should manage. The stress and risk of not guaranteeing rides is becoming a great cause for concern though."
The regional council could not be contacted last night.