We had a tow dolly that steered way back when we had the Class C. Never had them loosen up after tightening them for a second time. Did have one strap tare though. Thankfully it never snapped. We were able to get one ordered and in before we had to take off six weeks later. Visiting family back east at the time. With a steering dolly you must lock it prior to putting your car on it. Once set and strapped you release lock so it can turn.
A note about a steering tow dolly. The roads pounded it well and I had to realign it three times on out trip. Noticed it the first time when I saw the excessive tire ware. I watched for wear closely at each stop.
How tight do you keep the straps on your to dolly? It seems no matter how tight I get them I have to re tighten them almost every stop. I also noticed that if the dolly is not straight with or inline with the RV one tire or the other is not touching the stop, is that normal? I am thinking that they don't have to be that awful tight.
Usually load the Kr Kaddy 3 the night before. Need to retighten the staps in the moring before shoving off and recheck again before entering the interstate about 12 miles later. That usually does it but I do recheck at every fuel or rest stop.