I can't figure out the reluctance to take an ordinary trike into an ordinary grass runway on an ordinary airfield
Where I was taught to fly initial circuit training was on the tarmac but when the instructor decided it was worth trying to get the student more accurate the rather shorter and narrower grass runway was used instead. When I do circuit practice I generally use the grass.
Actually, getting authorised for a solo flight the other day, the instructor asked me why I thought I could go flying in that crosswind. I looked blank and said that my calculations showed it was OK on the cross grass runway. He hadn't thought of that and had only worked it out for the tarmac.