Windsurfers - what's your configuration? Best class c?

Maybe take a look at the Coachmen Cross Trail. Fairly new model, so may not be available used. Big garage under the bed, maybe large enough for a windsurfer.

https://coachmenrv.com/class-c-motorhomes/cross-trail

Or look at various vans with rear bath and twin beds, which allows a long item like a windsurfer or kayak to slide in through the rear doors and into the space between the beds.