Do speak to the other organisations I mentioned.
I have actually attended two public inquiries about my own land. The first was when we wished to divert a footpath within our garden. Away from the house to the outer edge of the garden. The local authority disagreed with this proposal (we had pp to extend the house and the FP was in the way so had to be moved) and forced a PI because they wanted the path diverted so it was adjacent to the extension but still in the middle of the plot.
To be honest, we found the inspector was very reasonable towards us and listened to our views carefully. DH is confident and was clear about why we wanted the path moved and how walkers could still use the path. We were treated as non-experts. (DH is an expert at inquiries now on civil engineering issues!) The LA got more of a grilling. The inspector came to the house and had a look around and asked the LA why they wanted the path diverted through the middle of the garden (we have a big garden). I saw the look of incredulity on his face. Judgement arrived 3 weeks later in our favour.
As lay people, it’s likely an inspector will be kind to you. From DHs experience these days, do not lie. Inspectors see straight through this. Do not make up usage of the woodland if you cannot prove it. Get evidence of use. Get evidence that the use was not challenged. How did people access the wood?
About 8 years later, we bought some land and a wood adjacent to our garden and found the previous owner had suffered local people cutting down his fences and wire to get access to the land. We then proposed to close the path in the garden and make a new one through our wood. It’s got great views.
We then had a PI to close the previously diverted path. We proposed a new path through the wood which would be the missing link in a ring of paths around the village. The Ramblers argued that they could already use the proposed woodland path because they had been doing so for over 20 years. However as this was via broken fences and cut wire, the inspector didn’t allow that argument. He agreed to get rid of the path in the garden. We did create the new path with kissing gates so everyone was happy. However it’s important that you do not argue from an indefensible position. Think carefully about what evidence you have and what you might settle for. Would a footpath (even a circular one) be a better solution?
This will obviously come down to your rights to use someone else’s land as opposed to the rights of the landowner to control access to his land. Whether your rights have built up over time is what is important and whether the previous landowner ever challenged the use of the Woods. In our case it had been challenged. It was not a right of way.
Lastly, DDs boyfriend is a property barrister at a top Chambers (I have not mentioned them) but I know what they charge, even at junior level! Cornerstone has the expertise on this though. Good luck.