We have the permoblie WC too and don't let them roll over one of your feet, give a whole new meaning to that weight that they are. Having them on top of you is definitely no better.
We have the Sienna that now sits in the garage with a trickle charger on the battery to keep it charged. DH liked that headroom as he's 6'2. He drove it initially when he could transfer and we have the easy lock. However, he can no longer stand to even be in the wheelchair and before that, it as just too much jostling in the van during a ride no matter what we did. It's pity, but he won't let me sell the van, incase I need to get him out of here. That, I silently laugh at because I could not get him in his chair alone no matter what, even with the lift we have. It definitely takes 2 due to his size. Enjoy what you can, while you can.
Hugs,
Sue