The river warden is usually very accommodating and will let you tie-up on the end of quay which is at the end of the river to the right of KYC club hse.
Don’t use KYCs pontoon which to the left of the ‘beach’ where dinghies are launched cos they don’t like it.
As a visiting yachtsman you can sign in to KYC and have a beer (Ringwood best is best) and there is usually food.
The Gun 200 yds up the road is also worth a look see. Watch the tides the river is getting shallower
Des