Pete,
Welcome and congratulations!
What follows isn’t strictly relevant to a BC23 (especially the bit about oars) but might give some idea of what’s needed, with an emphasis on safety. If on a sail & oar raid in my BR20, I take the barest minimum dictated by the raid’s safety rules, which in the case of Sail Caledonia is:
A bucket secured to the vessel by a lanyard and at least one other method of bailing (in my case a Whale pump fixed to the outboard transom plus a hand bailer with more than one use, if you get my drift)
Anchor, warp and chain suitable for the vessel (I take a lightweight Fortress and lead-weighted line, no chain)
Sufficient oars and rowlocks to propel the boat against a strong headwind (I take two pairs of surprisingly long oars and the oarsmen to wield them)
2 warps of 15 metres for use in the canal locks or for being towed (I also take one much longer warp)
Drogue or other device capable of slowing the boat in cramped conditions where oars cannot be used (they mean in locks)
Foghorn
Distress Flares, 2 x hand smoke or (preferably) floating smoke, 2 x pinpoint red (or laser flares). Flares to be kept in a sealed water-tight container securely attached to the vessel by a lanyard and accessible in the event of swamping.
Fire extinguisher (for vessels with engines or cooking facilities, so I don’t take one)
Buoyancy aids (not lifejackets) with whistle for each of the crew.
1st Aid kit.
Spare dry clothing in a water tight container
Survival bag or Thermal Protective Aid.
Food and warm drink for long exposed races
Small tool box
Bosun’s bag with (soft) shackles / pins / cordage (especially small diameter Dyneema and a suitable fid for splicing)
Sufficient fenders to protect one side of the boat
+ a good size boathook ( which doubles as a whisker pole)
+ a paddle for close quarter manoeuvring
+ a fully charged iPhone and/or iPad (for navigation, weather, countdown timing at race starts, music etc)
+ a hand held VHF (for listening in on race officials)
+ a camera with zoom
+ electric outboard and battery, fully charged
+ whatever fixtures and fittings go with the boat, which in my case includes a 12V lithium battery, GPS/fishfinder and Tacktick wind system with two displays
The electric items are recharged at the end of each day, so I don’t take spare batteries.
If I’m not racing, then all self discipline evaporates and you wouldn’t believe the amount of stuff that I cram in the boat.