"Kids are struggling to climb into it...... Any recommendations?"
I'd go for rock/ tree sliders combo. Does'nt aide getting in that much, but usefull protection, usefull to stand on to see over stuff and wash the roof etc. I suggest avoiding steps if you intend anything other than moderate green laning. Nackered mine, including the rear step, on my first propper mud hole outing
Brought mine from billing this year, they were £100 and are the best I've seen.
They are very big unlike some I've seen. They have scrapes on them so doing the job too