I'd always encourage anyone who wants to get more medical training, and I admire your enthusiasm. But EMT-P is more than a title, it's a comprehensive knowledge base and the real world experience to back it up. I know many of the local Paramedic schools won't allow someone to even register for the class unless you have at least 1 year of FULL TIME experience as a working EMT on either an ambulance or fire engine. I'm in complete agreement with this requirement.
Having worked on an ambulance for several years, and with many different paramedics, the thought of a medic who wasn't already a proficient and skilled EMT scares the crap out of me. ALS means you have enough invasive treatment, meds, and protocols to REALLY screw someone up if you make a mistake. Being a wilderness EMT on a SAR team is outstanding, but it would in no way give you the amount of ALS contacts needed to make a decent medic, even if you did it for many years.
Just my .02 cents for what it's worth. And so I don't come across as negative, kudos to you for the interest and effort to improve your skills. The world (and the wilderness) needs more people like that.
My background so you don't think I'm just talking out of my a$$.
EMT-B: 16+ years (3 of which were full time on the bus, 4 years part time on a fire engine)
EMT-T: 4 years "Tactical Medic" on SWAT (and entry guy)
Wilderness SAR team: 13 years (3 as a volunteer, 10 as an officer)
Paramedic school: Didactic, clinical internship, PHTLS, PALS, ACLS (but never got my license or completed my field internship)
PS- I'm in agreement with Sierra Ledge Rat. I think that W-EMT is probably the best bang for your buck if your EMS interrest is centered around SAR or the winderness. Docs are comforting to have around, because they can suture, and have such a vast knowledge of the body. But there are extremely few things that a paramedic is going to be able to do on a typical wilderness rescue team that an EMT could not. Keep in mind that NS IV's and ET tubes can be EMT skills in many counties, as long as the EMS director is on board and skills are maintained.