You can drive it with the hubs locked in, just have the transfer in 2wd and after you have backed up check that they are either locked or unlocked.
Up here in cold country we occasionally have problems with them.like I posted before, unscrew the cover on them and spray a light lubricant in there. They might free right up.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.