Yes – but it’s generally easier to hire these items on the islands.
Bikes, kayaks and other such equipment can be carried on the Scillonian at an additional cost (please see details here).
Bicycles and kayaks cannot be carried onboard the inter-island boat to Bryher from St Mary’s, so you will need to arrange for these to come on the freight boat (call 01736 334220 for details). Alternatively, you can paddle your kayak to Bryher.
It is worth pointing out that Bryher’s rough tracks are not particularly bike-friendly, so you may want to think twice about bringing a bike. You can hire bikes on Tresco and St Mary’s for use on those islands.
Before bringing your own boat/kayak/SUP etc, it may be worth considering hiring one from Hut 62 or Isles of Scilly Boat Hire – both based on Bryher.