Is it easy to walk with a bent trike, you can easily hold the bars on a df and walk but as as yet I don't own a trike, I just wondered how easy this is to do")
Yes and no.
With a recumbent trike the steering and brakes tend to be below knee hight so are a bit out of reach.
The normal trick with a delta trike is to just pick up the front wheel and to drag it along behind you.
A tadpole trike is a bit more tricky. The back of the seat/rack tends to be around waist heightso it's easy to push/lift it from there. The normal trick on the flat is to push it along on all three wheels until it goes off route. Then without stopping lift the back end over until the trike is lined up with where you want to go again and keep pushing.
Uphill is a bit more tricky as you'll put a sideways force on the trike as you try to pull it uphill. The greater the sideways force then the faster it will go offline. I tend to reach forward and down to rest my other hand on the front mudguard to help steer the trike. But that can be hard work on the back.
Now you must remember you're not anywhere near the brakes while pushing it and if you let it go on any type of slope it's going to try and roll away from you before you put the parking brake on.
That's why I find it just as easy, if not safer, to just get on it and ride it at a slow walking speed rather than push it along.
So it's doable but you have less fine control vs an upwrong.