"groups" in table and text field size

I created several tables differentiated by YEAR. They're pretty much the
exact same fields (survey questions), just different years (there's no
relationship). Within these YEARS, there are questions for different DAYS.

So with each ID, I added fields for all the questions for all 5 days. Now it
turns out that the ID's are grouped by DAY, not YEAR...meaning that a person
who answered the survey on DAY 4 did not also answer the survey on DAY
1,2,3,or5 (since the surveys were given different days and are anonymous).

So is it wrong to keep it the way it is on my YEAR table? The way I
separated it on my form is by creating a form for every year and using tabs
to separate the days. SO this means I would have to keep all the days on the
same table, right?

Any suggestions would be great on how to 'group' the days (on the table).
Thanks.

PS. I'm also having issues with the text field size. I originally used the
default 50 to created a whole bunch of text fields. But now, I need them to
be about 150 characters. I changed my default on my options, but this did not
go back and change my existing fields...kept them at 50. Is there any way to
change them all w/out changing the size one by one?