I use fiama ones never had any probs ,on soft ground I've cut the base out of bread trays that rolls etc get delivered in for soft ground and in the snow.cut out the base then chop into tyre width I get three turns of the wheel in length when they're joined up and have never been stuck yet.if ground is soft lay them down then put you ramps on top then a a couple behind so when you roll back keep going till hard ground is there.if it's really soft don't be a daftie and drive in then get stuck,walk it if in doubt.
Just a rule I use and find ok for me
Hope this is of use