So....I've got a small car, and a few bikes, and a trailer.....let me tell you about it.
The car's a v6 camaro.... not at all big or high-powered.
The hitch I bought from U-haul and installed myself. Actually, I was on a road trip, and needed a trailer to bring some things home. So we bought the hitch at a U-Haul in Chicago. As far as the skill level of the installation, we drove to a hardware store and bought the required wrenches (i think all we needed was 2 11/16 wrenches, or something close). Installed the hitch in the hardware store parking lot, then took the wrenches back inside and returned them for beer money. On a car with seperate turn signals and brake lights, you need a turn signal integrator to make the taillights function. Well, to keep more money in the beer fund, we drove to radio shack and bought 4 diodes instead, and made the integrator ourselves (we wired that up in the parking lot of a beer store). We drove back to U-Haul, picked up a rather large trailer, and drove it back to Dallas the next day.
Since then, I decided to build a trailer to tow a few dirtbikes. And yes, 2 250cc dirtbikes plus tools and gear weigh as much as an R1 and whatever else you take to the track. I built the trailer out of one of those kits like harbor freight has (mine came from northern tool, but it's the same thing). I used the plain frame kit like that, but buy the one with the bigger wheels for like 40 bucks more. After I stuck a plywood deck and some rails on it, I was at around $300 in the trailer. My only recommendation would be to pack the wheel bearings really well with good grease, then to lube them regularly. The bearings with the kit seemed to come with a really cheap shit grease, and not much of it, so just be sure to pack them well.
All in all, the trailer tows great. It fits in the garage easily, with the bikes on it, so when I wanna ride I can just hitch it up and go. I definately recommend it as a way to get to the track, and your car really isn't as small as ya think. Although, I would toss a small transmission cooler on the car, in front of the radiator of course, to be safe (plumb it in after the factory cooler, in the return line to the trans, but mount it in front of the radiator. this will give you the best cooling)