how much space do you have to the right side of the picture ?
if you had the space , I would pull the bricks up come through with the skid steer and cut that path the with if the bucket wide about 6 feet stay a good 6 inches away from your stacked stones on the left to not disturb them and 6 inches deep moving all that fill to the right in piles just out of the way then come in with crushed limestone and a walk behind compacter and make the crsuhed stone compacted grade 2 inches lower than the current grade and extend the crushed limes stone over to the right about 2 feet further than the walk if you give it any grade besides level I would go about 1/2 inch in 5 feet
I have never used the poly sand it may be worth a little research
using a locking channel it used to be angle iron or metal edging but now they make poly products that work well cost less don't break down here is an example with a nice diagram
http://www.homedepot.com/catalog/pdf...9a3db78ef5.pdf
as you set your brick use some small spacers little shims of wood to get a nice even spacing , you lay them and do not walk on them thsi si where you bring in the sand
you can used finely crushed limestone if the pavers can take the compression but I am not sure yours would hold up to that they are not concrete they are brick
you don't need sand uner a paver if they are flat but if they vary you can trowel out some sand but do not go deep 1/4 inch to max 1/2 inch it is there to be a cushion and leveler the more you have the more easily it can flow out and leave you eleven stones dampening the sand helps it to settle and trowel smooth easily
so for you sand or maybe this poly sand like I said I don't know of that product
add sand and spread it so that you are about 1/2 over the hole section of walk this is when you pull your shims all out if you have not already then you lay pieces of ply wood 7/16 , half ,whatever you can get as scrap and you run the compactor over the ply wood that is over the sand and pavers , the compactor run just over the pavers runs the risk of breaking them and
run the compactor back and forth moving the plywood helps to have 3 peices and a partner moving the next one ahead of you , I would also be getting gravel in to the left of the pavers between the stacked rocks and the edge of the pavers and get that compacted
to the right I would come about 1/3 of the way up the pavers with the grushed lime stone and compact that on the outside of the edging
some other things I can't see from the picture, your house is to the left does it have gutters on that side , if It does I would dig and ad pvc pipe under the walk before I put down the crushed lime stone so that I created a path for the down spouts to empty into and be carried part way down the slope , rain isn't likely to be heavy enough to wash your sand away if there is very little slope but down spouts are hard on any path or concrete
once I got 2 feet to the right of the path I would use the rest of the left over fill to blend that slope back in so that your getting at least 2 inches in 10 feet but try for not too steep as it is hard to get grass to grow if it is washing way blending being the goal and not any sharp change that a mower would get caught on
added notes , call digers hotline a week befre you start , and if you don't have skid steer lots of farms have them , heck even the amish farms here have a skid steer your likely to be able to hire out the skid steer work as it is basically a half day or one day thing to cut your path and haul in the crushed lime stone, a guy who knows his machine can do good work quick , and if he is used to running it in confined spaces like cleaning barns with it he should know where his corners are and avoid hitting things
I just went back and re-read your post , you say 2 foot frop to th fig try on right , I change my answer just a bit to a stack block retaining wall on the right , how much of one will depend on your space I still think about 12-18 inches of flat or near flat to the right of the walk if possible before the retaining wall this is provided you can't just build the area up and slope it farther from the walk , it will deepend again on how much space , and I don't know anything about fig trees and if they can be moved or if it hurts to build up the soil around them if you have the space but don't want to move the fig a stack block retaining wall to keep the walk near the fig but leave the fig would cut costs on block making a 6 foot semi circle about 4 blocks high at it's highest for these make sure to dig down 6 inches below the bottom of the wall and use crushed lime stone and the compacter to make a good base set yout block in the middle of the base and fill the back sides with the gravel it drains better and won't heave the stones compact level with the top of the block then add then next layer and repeat till you have the grade your looking for
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