24 to 29 Foot TT...Does Size Matter That Much?

I would say get the floor plan that best meets your needs. Towing will not be significantly different between a 24' to 29'. It might take a little more awareness around fuel stations and tight places.

Campgrounds-This will depend on where you plan on using the TT. Smaller older state parks and some national parks have limited spaces for larger trailers. The smaller the camper you will always have more options.