她承認，儘管公眾的一些反應是 "壓倒性的 "積極的，但她還是被這些反應 "拋離了方向"。
On 27 August 2019, US citizen Sacoolas turned out of RAF Croughton and drove on the wrong side of the road for more than 20 seconds.
She was charged with causing his death but an extradition request was rejected by the US government a month later, causing a diplomatic row between the two countries.
Speaking to BBC Radio Northampton, Mrs Charles said: "We have put ourselves out there... Harry has had to become household name to get justice done.
"When you choose to embark on a campaign, you have to take the rough with the smooth."
She admitted she had been "thrown off course" by some of the reactions from the public, despite it being "overwhelmingly" positive.
"The support we have had has been immense. Without the support of the public and media, we wouldn't be here - it has all been worth it," she added.
Sacoolas will be sentenced later this month and the Judge, Mrs Justice Cheema-Grubb, urged her to attend court in person, having appeared via videolink for previous hearings.
She said she was "a little more emotional, a little bit more tearful and little more accepting of the fact that I need to start allowing the grief to set in to now".