You do not need an atty. to create a contract for you and your clients...think of all of the points you'd like to highlight, then form a well written contract between you and your customer. As long as both parties agree to what you have written, it's a legal binding contract.
Regarding wedding, they are the ONLY customers that I allow a 50% NON-REFUNDABLE deposit at the time of signing the contract. I have been a bride and I am sure you all have been...brides get a little nutty sometimes prior to their weddings...If they should decide to cancel their order at the last minute, the deposit is forfeited. I have never had this happen...but we all know if could. Normally, I require 100% payment at time of the order...wayyy back when I started, I would bake the cookies and end up having customers have buyer's remorse and decide they didn't want to spend so much on cookies...hence the reason behind 100% payment up front...I have NEVER had a customer complain about that...after all, the are placing an order for something...
The details really are important, so my advice would be to clearing think about what you would like the contact to point out and execute it.
Best of luck!!!