For one bike, quick and dirty, just go buy four 1/2" eye bolts and some fender washers and mount them through the floor in the front corners, and one on each side about 5 feet back. Screw two 4x4's cut about a foot long to the floor on either side of the front wheel as an improvised chock. This is easiest. IF youwant to put those flush mount D rings in, some trailer shops, or hot rod/race shops often have them. They also through bolt with 4 bolts each. For the long run, you can't beat a run of E track full length down each side with a Pit Bull chock. Properly loaded, a trailer should have 10-15% of its total weight on the ball, ie a loaded trailer that weighs 3000 pounds should have 300 to 450 pounds on the ball. When hitched up and loaded down, the trailer should be level, or slightly nose down. Never noise up. Adjust your ball mount height to acomplish this. This is moreso important on trailers without brakes. As for rear jack stands, they are only necessary if you want to load/unload with the trailer unhooked. Most trackdays and such thee shouldnt be a problem leaving it hitched up. And easy temporaty fix, such as if youwant to load the trailer at your house unhitched, is to just put a car floor jack under the rear of the trailer. Be sure the wheels are chocked.