Firstly..

I can't even go to the place my Dad's ashes were scattered on his anniversary because I can't walk down the slope to get there :(
Could you hire a wheelchair and get someone to take you there?

I don't know if this:
Devon Community Directory - North Devon Shopmobility Volunteer Escort Service & Wheelchair Hire

is near you but if not I'm sure they would point you to the correct place for your area.