Great basic trailer:
http://cgi.ebay.com/NEW-InSTEP-QE125...QQcmdZViewItem
we have many hundereds of trouble-free miles on ours. Packs down nice & flat, comfortably handles heavy loads, very stable. I put Stan's in the tubes and no flats. I've towed about 100lbs (kid +beer) in here

Can pack a shocking amount of stuff in there, even with a kiddie.
Cheers & best of luck