There should be plenty of parking but it is spread out a bit.
In September, Cascade Locks averages a high of 75 degrees and a low of 56 degrees. We are unsure of how windy it may be, or if there will be rain at this point and will update this again closer to the wedding.
The ceremony is on grass and requires walking a few yards to get there. If you want to wear a heel, I recommend wedges or buying something like GoGo Heel Stoppers (those are what I will be using) to protect your shoes during the ceremony, and then they can be removed for the reception.
This is a once in a lifetime day for us, and for our loved ones. Your kids are our loved ones too, and we were torn about including them in the festivities. Ultimately, due to the limited capacity is limited capacity we reserved seats for adult guests only. We hope you can take this as an opportunity for a fun night out and look forward to spending the evening with you!