Can I still fly into Bangkok during lockdown, and can my wife pick me up after my isolation?

Probably you can fly in. Probably your wife needs a travel permit to enter Bangkok. A pick up from Hotel isn't really a hard reason to enter a dark red zone, but that might change within the next 14 days

All restrictions are until August 1st or 2nd. Don't ask, what might be after that date. Here you get speculations only

On your TM6. The one you get on the flight and fill in for immigration. You will need 2 address’s.

1 is your ASQ hotel.

2 is your address after quarantine.

Also a Thai telephone number is required.

After quarantine you get a quarantine certificate from reception this allows you to travel on your day of release.

I travelled by taxi from Pattaya to Nong Khai and was stopped by the police. Gave them the certificate and allowed to continue no problem.

No quarantine required in Nong Khai.

I’m not sure on your wife getting through. I believe she has to get a document from the local police with permission to travel in to Bangkok.

I'm I'm quarantine now in pattaya, I was due to go to buriram to visit family, however due to buriram province strict rules I would have to do a further 14 days quarantine there. As my stay is only 5 weeks we've decided to stay in or around pattaya with my wife and child coming here. They may have to quarantine when they go back to buriram. Check your destinations rules as they differ from province to province.

I just flew in a week ago. Day # 8 of ASQ.

You should rent a car or minibus to take you wherever you have to go. You will have all the correct paperwork after ASQ. I also assume that you will have been vaccinated in your home country.

Your wife is another matter

Don't put her through all the hassle of getting to Bangkok and then the probable even bigger hassle of getting back to your home province.

Have her welcome you at home!

You’d need to be aware of any restrictions in place at your destination. For example in Phuket currently you can’t enter unless you are fully vaccinated and have a negative Covid test within 7 days (or recovered within 90 days).

Fly in from overseas yes, and pick up yes.