Depends on how you camp/travel too...MH is great for cruising and sightseeing, you can't beat being able to use the fridge and restroom while on the road. A MH didn't work for us because we needed 4WD to get on the beach and other places.
The MH is also another drivetrain to maintain, we couldn't justify the extra maintenance considering that we don't even use the TT as often as we like due to work schedules. I also do a lot of home repair, so the truck would have to stay. I do with I could tow a boat though...
There's no right answer, it all depends on how you travel or plan to travel.