Hi Lushcaz, we’ve had a WAV for about 3 years now (Fiat Doblo) & I must admit that I do find it very uncomfortable to go long distances. I’m in a power chair & like your husband, only have the w/chair headrest which doesn’t allow me to relax, as in a normal car seat with headrest. The longest journey I’ve managed so far, is two hours. As my chair has no suspension, I find any longer is very uncomfortable…I feel every bump (pothole!) on the road as there’s nothing to cushion me.
I’ve just had a test drive in a new WAV (Peugeot Horizon) & found it so much more comfortable. Nothing will feel as good as a car seat but I’m sure this one is much better than the Doblo.
I found things slightly more comfortable in the car when I changed my w/chair seat to a canvas one, rather than a hard one. A deep gel cushion in my chair helps too.