Any Advice before 1st fill ???

I go for a barium swallow this Wed. morning at 8 am at Greenwich Hospital in CT. After that my doctor is going to inject 1.5 cc in my band. Does anyone have any advice before the injection? I want to get the best results. I have heard different things in the past. Should I eat very light the evening before? After the first fill am I going to be really hungry? What is the purpose of staying on a clear liquid diet for the 2 days? Thanks for your advice .....

I go for my second fill tomorrow morning and I wasn't sure what to do the first time so I didn't eat and my doctor told me I should eat before I get my fill so I'm not so hungry? I can tell you I'll be getting up early tomorrow to eat because I was starving last time and I had to eat some cottage cheese to hold me over that night. Good luck on Wed!