The Berkeley Lab Guest House http://www.berkeleylabguesthouse.berkeley.edu is a short 5-minute walk to the workshop location, so there is no need to drive and park when you stay onsite. 
The standard room rate is US$100 per night.  Please make your reservation directly by email: berkeleylabguesthouse@berkeley.edu or phone: 510-495-8000) and ask for the ICFA-ICUIL room block. The rooms are being held until Friday, September 2nd, after which they will be released, so please make your reservation as soon as possible.

Downtown Berkeley:

There are two downtown hotels located near the LBNL shuttle bus route:

1. Hotel Shattuck Plaza (http://www.hotelshattuckplaza.com) with a Lab rate of $114 + tax per night.

2. Downtown Berkeley Inn
(http://www.downtownberkeleyinn.com) with a Berkeley Lab rate of $99 + tax per night.