31's will fit a 3" lift real nice. heres what i did to lift my 90 3".
Front End - i made coil spacers for the front, (2.75" spacer and bought another spring isolator really). If had the cash at the time though, i would'v gone with new coils too though. I didn't do anything with the trackbar at first either, but I eventually ended-up with an adjustable one to recenter the axle. no new bracketry or anything though. i still get a bit of the Death Wobble with my set-up. you might wanna think about a dropped pitman. it's not neccesary though.
Rear - made 1.5" blocks and bought 3" extended shackles for an addition 1.5" lift to total it at 3" (not accounting for the factory spring sag). wouldn't reccomend this though, with the factory leafs and the blocks, the axle would do this weird hopping around thing sometimes when in low traction 2wd situations (not usually if i had in 4wd though). i don't know if it was axle wrap from the 1.5" blocks or just the soft springs dealing with 31's or what, it wasn't crazy bad or anything, but it was just pretty annoying. i ended up getting rid of the blocks and factory springs and getting some Old Man Emu lift leafs for the rear, kept the extended shackles though. I think the rear ended up about a 1/2" higher when i made that change, but it was pretty level with the front, so i think that with the factory spring sag, i ended up still right around 3". I personally love the OMEs, really great ride, no more hop.
also, if you'r looking for articulation when wheelin and you haven't considered it yet, think about getting some front swaybar disconnects. JKS quicker discos are the way to go. i also removed my rear swaybar entirely for the extra flex. a bit more body roll when the road though.
31's will rub the lower control arms a bit when turning really tight (like when parking and stuff). you might wanna think about changing your backspacing if you don't like the sounds of loosing a bit of turning radius. i haven't done that though, so i don't know what to change it to. i find it not to be a big deal and just don't turn the wheel that far anymore.
keep an eye on the rear driveshaft slip yoke into the transfer case. it CAN fall out. I'v heard of people reccomending a transfer case drop kit or a SYE (Slip Yoke Eliminator) at 3". I don't have either and everthings been okay with mine. tolerances for each vehicle can stack up differently though, so at least look at it.
if you don't want vibrations from your driveshafts, make sure that understand about differential pinion angles.
good luck and have fun ! you might already know this, but start sprayin those nuts and bolts with penetrating spray ASAP. I don't know if parts rust in Alaska like they do here in New England, but i like to spray'em at least couple of times during the week before i turn'em. (that is if i actually plan that far ahead)
off topic, but what's the wheelin like in Anchorage anyway?