Furniture hire for diy reception

Hi there, looking for some advice re hiring chairs, tables, linens and crockery/cutlery etc for my wedding on 01/10/11. We're doing a DIY reception at a lovely village hall, and looking to be able to seat about 150. The hall has some tables and chairs we can use but not enough, and we're looking to hire seating and tables for about 100. So, any reccomendations for the Hertfordshire area? We'd like to avoid getting chair covers if possible (as I think they're an unnecessary cost!) but would consider them if they were cheap enough. Any tips for particularly cheap places? I have found a number of companies through google searches etc but could do with some tips from experience. Thanks very much, and hello, I'm new