Multiple day contract

I am working up a contract for a client who wants to hire me for three weekends in a row, four hours a day. One of the dates is pending, while I wait for a previous client to get back to me about one of the dates.
I am giving them a discount for booking multiple hours/days, but also have to charge a small travel fee because it is an hour drive both ways.

Should I include each date in the contract or send a new contract/invoice every week? Break the total down per day or for the entire time?
I haven't done a contract for multiple dates like this and want it to be clear and easy to understand for the client.

Payment each day or all at once?

I have done both...do they have a preference?

I've got a golf course doing brunch with Santa for the 4 Sundays in December, and I'm writing up separate invoices for each of them, taking care of payment at the end of each event.

I've also got a client who, for the 3-day Chinese New Year event each year, gets billed for the event as a whole, so all 3 days on one contract/invoice - though their other CNY event is at a different mall on a different weekend and I write up a different invoice for that.

Another client booked a full weekend (Sat/Sun) and wanted to be billed for each day separately.

For separate weekends, I would personally want to do separate invoices, because once I do an event I like to file the invoice away - but I'm thinking I've got a bit of OCD, lol.

Sorry, I don't even know if that helped at all or if I've just confused you more!

It did help Kristal. I will email the client and ask what their preference is.
Thank you so much!

I've usually invoiced for each weekend when doing a multiple.