Please see: http://www.codethat.com/grid/ for a spreadsheet tool.
This product I have used and found it adequate.

HOWEVER I dont think that a spreadsheet type grid may be the one for you.

Products that make it easy to enter data often make it real hard to report and get information on that data. for instance you could easily type everything into a text field, but that would make reporting on the data a bit hard.


FacileForms is good and has a thriving community.
But there is a bit of a learning curve and the forms editor is the most tedious and laborious editing tool I have ever seen.

(both of them have good features but require a big investment in time and learning - which however can be quite rewarding!)


DBQ (see Joomla extensions site) has a simple way of creating forms tied to a database) and it is much simpler.
I would recommend DBQ, because it  will just list the fields -which is just the same way you have it on your PDF- and you can always use facile forms later, and have it read/write to the same tables you created with DBQ


You could also have use a forum. With topics or threads to store the forms (which are actually posts)
You use the forums admin tools to determine who has access to what.

For simpleboard/joomlaboard you make all users moderators of that particular forum (or just the few who have responsibility for that function)
Your big problem with this is that two people can edit the post at once and mess it up (one will lose all their changes) so you would either have to code some feature to let people know that a particular post is being edited or just arrange different times for different people.


if the data being updated is not great, it may be ok to run the moderate risk of two people editing the same itinerary at the same time.
You also have the benefit of the forum noting in your form (the post) how often it was edited and by whom.

SMF is really good with this.

So there you have it:3 methods one of them a serious cludge but maybe your only hope if you dont want to learn how to program a real solution!