I believe I have solved my own problem.
I did not have a full libertine install done (no write access to the tablet) so chances are a lot of per-requisites were missing. I think OTR can handle libertine containers in addition to the other stuff that it does, but more was missing.
Doing the following below, I was able to successfully install DOSBox on my BQ tablet. Couple of catches is from what little I have tested it can be sluggish (especially when multitasking with a background terminal session (from my computer), and the sound does have some remnants (distortion post making sound if that makes any sense). I was also able to mount my home directory (mount 
~/Downloads/dosbox) and copy over my apps and games with no problem. I have only tested this with a bluetooth keyboard. There may be a much better way of doing this, however I have yet to see any info on doing this. I principally wanted to play some old dos games (and wordperfect lol).
Steps to install DOSBox on Ubuntu Touch
Computer Side
I had magic-device-tool installed (for Phablet-tools and other pre-requisites)
Ubuntu Touch Side
-
Enable read-write access to install libertine support (this will reboot tablet)
phablet-config writable-image -
Install Libertine Software
apt-get install libertine libertine-scope xmir python3-libertine-chroot -
Create libertine DOSBox container
libertine-container-manager create -i dosbox -t chroot -
Install DOSBox in libertine container
libertine-container-manager install-package -i dosbox -p dosbox -
Configure DOSBox preferences
nano /home/phablet/.local/share/libertine-container/user-data/.dosbox/dosbox-0.74.conf
I changed the following settings (all under SDL)
fullscreen=true
fulldouble=true
fullresolution=1920x1080
output=overlay
- Setting the full screen resolution to the max (1920x1200) caused DOSBox to crash. I chose 1920x1080 to get the most coverage on screen (this can obviously be tweaked)