I don't plan on having my child stoker on the bike while it is on the kickstand. I do plan on trying to get my three-year old out of the trailer while it is on the kick stand. Would you recommend the Pletcher over the Ursus? The Ursus appears to have a bigger profile that would be touching the ground. Which does better on grass or gravel? I ride 90% of the time on paved trails; but I am planning a 80 mile gravel ride with the boys this summer.