I am a new RVer and a women to boot!! so to all the men out there bear with me and my questions. I am looking to buy my first TT. Wanting something simple and size does not really concern me except for the towing part. I have lilmited experience on towing and will only be going a few hours from home on my trips. My thinking is to go with short 17-19 ft. trailers. Someone told me that size (17-19 ft) of trailer is only a single axle and will have more sway than say a 21 ft on two axles and should consider a 21 ft. Is this so and is there much difference in towing these sizes? Once again I thank you in advance for any help and input on this.