We like fish bm vs guanos ourselves but.. You can always try both.. However, another simple solution is urinating the perimeter.. That'll scare this sheet outta any nearby deers, etc. you could show up with a back pack super soaker full of (male) party piss haha. They won't come anywhere near.
Could plant some thistle too, or something spikey, but that'll be beitch later haha.
Only other things I would add if its possible in time, on budget etc, is:
- a chitin source, for immunity, like frass,
- a silicon source, like DE for cooling,
- and a root network amplifier, ie myco fungi
(But after cooking or mellowing as we call it) ..
Boost root mass by 700-1000x and ups pest defence too, especially root eating nematodes, mon.
10 bux each category might be well worth it come harvest time..
Going beyond this might give you power-herb worthy of positive magazine vibes... Beware
If you think the plot will be good for another year, greensand too.. Prevents P and especially K def, also releases dozens of trace elements for 2 years.
And perhaps my biggest priority would be a handful or two of live, slithering wigglers.. They are under rated big time for their exudates, and aeration channels. 50/ cu ft is our goal.
A cup of rice or oatmeal wouldn't hurt, either.. and helps feed a healthy fungal network. Ya mon!
A couple teaspoons of cinnamon or capsaicin (hot pepper seeds etc) per batch would have a lot of pest benefits too...mites, thrips, aphids, and gnats all hate one or the other, interestingly enough..
Best of luck either way, champ!!