Eggs is eggs is eggs .... was one of my granny's favourite sayings ...
Making your own dried eggs is quite do-able although it is for me, too lengthy, potentially messy & too fuel hungry to be undertaken whilst afloat ... it is worth noting that if you dry cooked eggs (either scrambled, boiled or cooked into an omelette) that is what you are stuck with when they are reconstituted ... on the other hand, if raw eggs are dried then the reconstituted eggs can be used in any recipe which calls for beaten eggs (cake baking, omelettes, scrambling etc) ...
Dried egg products are widely used by the commercial baking industry ... whole eggs, egg whites & egg yolks are all available in dried form ...
links to possible suppliers :
http://www.bepa.org.uk/Home/
http://store.honeyvillegrain.com/
& ... for the DIYers :
http://www.dryit.com/driedegg.html
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