With a terrain like that, a smaller crawler or monster truck like the wraith, mini summit, Gmade-R1 etc would be the most fun in my opinion.

Do you like crawling or want something fast? I think you'll find, at least with me, that racing at a track just makes you dissapointed that you don't have a $1000+ car that can "keep up", and that it is better to put money towards a good basher that you can use at a track if you want to.

Unless it's a smaller stadium truck, they don't really seem like good bashers. Besides the BMX track, I don't think it will be much fun in a small area.