There are several good places to fish between Ringwood and Bournemouth. Cheaper for day tickets as well. Plenty of fishing around Ringwood. Day tickets in Ringwood. I am not an expert as I have not been down that way for a long time but, worth checking out. I believe there used to be a campsite outside of Ringwood, but cannot quite remember for sure. There is a place called Bisterne Fishery between Ringwood and Bournemouth. This was a country estate and they used to allow tents. Lovely fishery and not far from the Royalty.The problem was it was closed some months of the year but, might be worth checking out on google or something. There was also a pub I think it was called the Queens Head further down from Bisterne. They had some day ticket stretches but, I cannot remember if they allowed camping. Again might be worth checking out if you can locate the pub. Give them a ring maybe. Then there was Winkton fishery further down but, dont know much about that.
This infromation is probably a bit out of date now but, did used to go that way a lot.