CHL is NOT legal photo identification!
When I checked with DPS last year on this issue, I was told that the CHL does NOT count as a form of legal identification even though it is issued by the same folks who do the DLs and IDs for the state. Why is it you think that you must present your DL or Texas ID with your CHL? It is because the CHL is not actual identification.
In fact, DPS does not consider a CHL as either a primary or even a secondary form of identification at all! A CHL only is considered as 'supporting identification' along with other such notable documents as these others...
http://www.txdps.state.tx.us/administration/driver_licensing_control/IdRequirements.htm
1. school records;
2. insurance policy (at least two years old);
3. vehicle title;
4. military records;
5. unexpired military dependant identification card;
6. original or certified copy of marriage license or divorce decree;
7. voter registration card;
8. Social Security card;
9. pilot's license;
10. concealed handgun license;
11. Texas driver license temporary receipt;
12. expired driver license or identification certificate issued by another state, territory, District of Columbia, or Canadian province that is within two years of the expiration date.
13. a foreign passport (with or without a United States Visa); or
14. a consular document issued by a state or national government.
So DWS1117 and others, if you are willing to take a report card, insurance policy, etc. as identification, then sure, it is great.
A CHL is NOT a legal picture identification in Texas as per the department that issues DLs, IDs, and CHLs.
Legally, maybe a note from your mother would carry more weight? Close, but probably not.