Sorry, my earlier post had massive typo's from using my phone without proofreading. Please bear with me while I repeat it with those typo's corrected and a few things added.
Google keep and Android 4.3 + (*) enables easy dictation and saves both the audio and the text transcription together in a Google Keep note on your phone. Does not require internet data at the time of recording. Of course does require wifi/data later if you want to sync later to your pc.
I use Keep for exactly the purpose you mention (record ideas on the road). You can initiate dictation with simply one tap from the homescreen widget (tap on the mic part of the widget). When you stop talking for a few seconds, it dings to acknowledge that it's done listening and it saves the note. Tap mic again to start a new note. When I have more time later I go through each note and see if I can read the text. If text is garbled, then I listen to the audio and correct the transcription. Once satisfied with the transcription, I delete the audio. Then (once audio deleted) the note can be shared on my phone to a text application like gtasks. Once shared I delete the note from Keep. From gtasks I refine the note by assining it to a category, adding urgent tag where applicable, and assigning due date/time if applicable (which automatically notifies me at that time of course). I like gtasks but you can share with any note or to-do app you want. For a simpler system, you could avoid sharing the note and just manage it within Keep where you have primitive organization tools (you can assign a color and an alarm time to a note) but you can't really see everything in a category (color) or sort sensibly or view upcoming tasks by due date etc.... those Keep organization tools are not enough for me.
If you really have your heart set on sending the text/transcription to email rather than Keep (or if you have Android 4.1*), then you can use an ifttt recipe which will take phone calls you make to ifttt number and forward both recording and transcript to your email. Again no datat is required. Here is the IFTTT recipe to do exactly that
https://ifttt.com/recipes/774-dictate-a-voice-memo-and-email-transcription-and-mp3-file-to-yourself
IFTTT is a great free service which can do a TON of neat things very easily (search "best IFTTT recipes" for a flavor... I'll bet you get hooked) . But please avoid the ifttt Android app because of all the intrusive permissions. You can set all your recipes up using ifttt on the web from pc without installing the Android app and still take advantage of 99% of IFTTT's capabilities without handing over the keys to your phone.
* I am currently using a backup phone with Android 4.1 while my Android 4.3 phone is being repaired. Keep doesn't work as well on 4.1 (doesn't work off-line unless you select google voice typing, and then it doesn't save the audio). So I'm using the IFTTT recipe right now... just takes a little longer to dictate a memo and to manage it afterwards.
