I am running with snapshot 4e5aac472935ce3ba3abc9bd72b880951843092b (the one with the bridger update) and did not have to reboot my rt3200 since more than a week.
Before this bridger update I had to reboot more frequently (sometimes daily), in particular with more wifi STAs.
The RT3200 are APs with bridger installed and enabled (even though WED is off right now) and they do have vlans.
Edit: had to reboot again, but still seems to be needed less frequently.