This is not a question but in looking through some old forums, I found where I'd previously posted my directions for avoiding the Mobile Tunnel. I thought it might be worth posting as it's own thread so that others can find it in the future. I posted earlier today with a similar set of directions (in another person's thread) but these are actually much more detailed. We used this route last summer and got through Mobile on a Saturday with no problems!
Directions: When you're on 98 (coming from the Hattiesburg way), take I-65 NORTH (instead of the usual route of I-65 South) to I-165. On 1-165, take EXIT 2--the Bay Bridge Road/Highway 90 EAST exit. Stay on Highway 90 EAST and you'll go across a big bridge that takes you over the shipping channel (you'll also go past the battleship USS Alabama). You can then look for the I-10 entrance ramp and head on to Gulf Shores. We got on I-10 right after the battleship but I think you can also stay on 90 a bit longer if you want and that might be useful if traffic is bad on 10.