Doing a complete 180 on my wedding plans!

So, I am from WA state and I was originally planning for my wedding in Seattle but last minute wanted to do a very small ceremony due to our budget. We may have around 20 people at most. So we are planning to rent a car and get married in South Lake Tahoe, CA where he and his family grew up and where he proposed. His grandpa will be marrying us. However, I need so much information on what I need to know about being married in a different state and photographers in the area that can take amazing photos leading up to the wedding and the very short ceremony (I do not need to find a huge package that they usually offer may be only an hour or two..so maybe an amateur photographer? Trying to keep it low in $!) Looking to marry at Emerald Bay and know nothing about what's required to get married here..also looking for websites where I can get a wedding dress, been looking at fashion nova but the one I want is out of stock! Anything else you think is helpful is appreciated...