[Closed] Ryanair - book flight now, bike box later?

I'm fairly inexperienced with the wonderful world of Ryanair so thought it was worth checking.

We're optimistically booking our summer 2021 Pyrenean tour.

Tour organiser only takes a £99 deposit per person which is refundable if anything is cancelled due to Covid/foreign office advice. So far so good.

Ryanair flights are available and very cheap. I appreciate the risk that we wouldn't get a refund on these regardless of circumstances, but that's fine, it's a gamble.

What about baggage fees? Bikes in particular. They're non-refundable, but once I've got my seat, any reason not to wait until e.g. 3 months before flying before booking bike on? Any reason to book bike on earlier? We're flying to Toulouse so I wouldn't expect the plane to be as full of bikes as e.g. a flight to Lyon or Palma...

Ta