With questions like these, it's always nice to have an aerial view or a few ground-level photos so we can get an idea of your terrain, but it sounds like your ground is pretty crunchy – especially when things dry up for the summer.
Also don't know the specs on your NV gear - what magnification is it? 4x + is nice for spotting and identification purposes, but makes it rough when you're trying to use for mobility.
Consider setting up a dusk to dawn IR light at the feeder – this'll make it easier to monitor without having your IR beam being blocked by foliage when you're off the stand.
Stay or move?
A couple of thoughts:
If you do not have an immediate need for meat in the freezer or the short-term goal of fulfilling a landowners request to "eradicate" the hogs from the area...
Spend $35-$40 on a good set of audio earmuffs, and get out into the wild.
Because moving on foot with the headphones will help you in several ways.
First, you will improve your fieldcraft –
which is more valuable than technology in the last you a hunting lifetime.
When you realize how noisy you really are bonking around, you'll be able to take preventative measures.
These included securing or softwrapping squeaky or clanky gear, walking heel to toe and determining especially noisy routes.
If you don't have the time or access during daylight hours, you can clear debris from them each time you pass through - a couple of rocks or sticks at a time adds up (or, in this case, subtracts).
The headphones will also allow you (hopefully) to hear hogs before they hear you, possibly getting you a clean shot - which you're going to need with the .223.
Finally, it will help your familiarity and navigation of the terrain at night – which looks looks much differently through NV than during the day.
And consider setting a few bucks aside each month for a thermal monocular for spotting – it will be well worth it.
And the price is dropping every month…I believe SlimShady picked up a serviceable one recently for about $700. Not long range, but it sounds like you don't need it to go past 100 yards.
And you will be amazed at how much you can learn from little white blobs in a 1 1/2" screen.
Good hunting - keep us updated!