Can I Renew My Tourist Visa Without a TM30?

Keep in mind if you go to another immigration office you need to have an address IN the area that is served by that office. Meaning you can't go to the Samut Prakan immigration office using a bangkok address of where you're staying.

You said you're in Bangkok, GO to the government complex out at Chaengwattana Road and get your extension. IF you get there around 9:15 (after everyone else has gotten in to the building) you'd be out by 10-10:30 because tourists don't wake up early and the section you need to go to will not have many people in it

There is NO requirement to have proof a TM30 was filed to get a 30 day extension on a 30 day visa exempt or 60 day tourist visa at the main immigration office out at the government complex on Chaengwattana Road

What Immigration Office?

I'm sure if you book the hotel and show them the receipt then you should be fine